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<h1>Source code for django.db.models.lookups</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">itertools</span>
<span class="kn">import</span> <span class="nn">math</span>
<span class="kn">import</span> <span class="nn">warnings</span>
<span class="kn">from</span> <span class="nn">copy</span> <span class="k">import</span> <span class="n">copy</span>
<span class="kn">from</span> <span class="nn">decimal</span> <span class="k">import</span> <span class="n">Decimal</span>
<span class="kn">from</span> <span class="nn">django.core.exceptions</span> <span class="k">import</span> <span class="n">EmptyResultSet</span>
<span class="kn">from</span> <span class="nn">django.db.models.expressions</span> <span class="k">import</span> <span class="n">Func</span><span class="p">,</span> <span class="n">Value</span>
<span class="kn">from</span> <span class="nn">django.db.models.fields</span> <span class="k">import</span> <span class="p">(</span>
<span class="n">DateTimeField</span><span class="p">,</span> <span class="n">DecimalField</span><span class="p">,</span> <span class="n">Field</span><span class="p">,</span> <span class="n">IntegerField</span><span class="p">,</span>
<span class="p">)</span>
<span class="kn">from</span> <span class="nn">django.db.models.query_utils</span> <span class="k">import</span> <span class="n">RegisterLookupMixin</span>
<span class="kn">from</span> <span class="nn">django.utils.deprecation</span> <span class="k">import</span> <span class="n">RemovedInDjango20Warning</span>
<span class="kn">from</span> <span class="nn">django.utils.functional</span> <span class="k">import</span> <span class="n">cached_property</span>
<span class="kn">from</span> <span class="nn">django.utils.six.moves</span> <span class="k">import</span> <span class="nb">range</span>
<div class="viewcode-block" id="Lookup"><a class="viewcode-back" href="../../../../ref/models/lookups.html#django.db.models.Lookup">[docs]</a><span class="k">class</span> <span class="nc">Lookup</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">lhs</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span> <span class="o">=</span> <span class="n">lhs</span><span class="p">,</span> <span class="n">rhs</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rhs</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_prep_lookup</span><span class="p">()</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="p">,</span> <span class="s1">'get_bilateral_transforms'</span><span class="p">):</span>
<span class="n">bilateral_transforms</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">get_bilateral_transforms</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">bilateral_transforms</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">if</span> <span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="c1"># Warn the user as soon as possible if they are trying to apply</span>
<span class="c1"># a bilateral transformation on a nested QuerySet: that won't work.</span>
<span class="kn">from</span> <span class="nn">django.db.models.sql.query</span> <span class="k">import</span> <span class="n">Query</span> <span class="c1"># avoid circular import</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">rhs</span><span class="p">,</span> <span class="n">Query</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">(</span><span class="s2">"Bilateral transformations on nested querysets are not supported."</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span> <span class="o">=</span> <span class="n">bilateral_transforms</span>
<span class="k">def</span> <span class="nf">apply_bilateral_transforms</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">for</span> <span class="n">transform</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="n">value</span> <span class="o">=</span> <span class="n">transform</span><span class="p">(</span><span class="n">value</span><span class="p">)</span>
<span class="k">return</span> <span class="n">value</span>
<span class="k">def</span> <span class="nf">batch_process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">rhs</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">rhs</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="n">sqls</span><span class="p">,</span> <span class="n">sqls_params</span> <span class="o">=</span> <span class="p">[],</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">p</span> <span class="ow">in</span> <span class="n">rhs</span><span class="p">:</span>
<span class="n">value</span> <span class="o">=</span> <span class="n">Value</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">output_field</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="p">)</span>
<span class="n">value</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">apply_bilateral_transforms</span><span class="p">(</span><span class="n">value</span><span class="p">)</span>
<span class="n">value</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">resolve_expression</span><span class="p">(</span><span class="n">compiler</span><span class="o">.</span><span class="n">query</span><span class="p">)</span>
<span class="n">sql</span><span class="p">,</span> <span class="n">sql_params</span> <span class="o">=</span> <span class="n">compiler</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="n">value</span><span class="p">)</span>
<span class="n">sqls</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">sql</span><span class="p">)</span>
<span class="n">sqls_params</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">sql_params</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">_</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_db_prep_lookup</span><span class="p">(</span><span class="n">rhs</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">sqls</span><span class="p">,</span> <span class="n">sqls_params</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'</span><span class="si">%s</span><span class="s1">'</span><span class="p">]</span> <span class="o">*</span> <span class="nb">len</span><span class="p">(</span><span class="n">params</span><span class="p">),</span> <span class="n">params</span>
<span class="k">return</span> <span class="n">sqls</span><span class="p">,</span> <span class="n">sqls_params</span>
<span class="k">def</span> <span class="nf">get_source_expressions</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs_is_direct_value</span><span class="p">():</span>
<span class="k">return</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="p">]</span>
<span class="k">return</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">set_source_expressions</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">new_exprs</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">new_exprs</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lhs</span> <span class="o">=</span> <span class="n">new_exprs</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span> <span class="o">=</span> <span class="n">new_exprs</span>
<span class="k">def</span> <span class="nf">get_prep_lookup</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'_prepare'</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="o">.</span><span class="n">_prepare</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">prepare_rhs</span> <span class="ow">and</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="p">,</span> <span class="s1">'get_prep_value'</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="o">.</span><span class="n">get_prep_value</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span>
<span class="k">def</span> <span class="nf">get_db_prep_lookup</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="k">return</span> <span class="p">(</span><span class="s1">'</span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="p">[</span><span class="n">value</span><span class="p">])</span>
<div class="viewcode-block" id="Lookup.process_lhs"><a class="viewcode-back" href="../../../../ref/models/lookups.html#django.db.models.Lookup.process_lhs">[docs]</a> <span class="k">def</span> <span class="nf">process_lhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">lhs</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">lhs</span> <span class="o">=</span> <span class="n">lhs</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span>
<span class="k">return</span> <span class="n">compiler</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="n">lhs</span><span class="p">)</span></div>
<div class="viewcode-block" id="Lookup.process_rhs"><a class="viewcode-back" href="../../../../ref/models/lookups.html#django.db.models.Lookup.process_rhs">[docs]</a> <span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">value</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs_is_direct_value</span><span class="p">():</span>
<span class="c1"># Do not call get_db_prep_lookup here as the value will be</span>
<span class="c1"># transformed before being used for lookup</span>
<span class="n">value</span> <span class="o">=</span> <span class="n">Value</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">output_field</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="p">)</span>
<span class="n">value</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">apply_bilateral_transforms</span><span class="p">(</span><span class="n">value</span><span class="p">)</span>
<span class="n">value</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">resolve_expression</span><span class="p">(</span><span class="n">compiler</span><span class="o">.</span><span class="n">query</span><span class="p">)</span>
<span class="c1"># Due to historical reasons there are a couple of different</span>
<span class="c1"># ways to produce sql here. get_compiler is likely a Query</span>
<span class="c1"># instance and as_sql just something with as_sql. Finally the value</span>
<span class="c1"># can of course be just plain Python value.</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="s1">'get_compiler'</span><span class="p">):</span>
<span class="n">value</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">get_compiler</span><span class="p">(</span><span class="n">connection</span><span class="o">=</span><span class="n">connection</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="s1">'as_sql'</span><span class="p">):</span>
<span class="n">sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="n">compiler</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="n">value</span><span class="p">)</span>
<span class="k">return</span> <span class="s1">'('</span> <span class="o">+</span> <span class="n">sql</span> <span class="o">+</span> <span class="s1">')'</span><span class="p">,</span> <span class="n">params</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_db_prep_lookup</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span></div>
<span class="k">def</span> <span class="nf">rhs_is_direct_value</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="ow">not</span><span class="p">(</span>
<span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'as_sql'</span><span class="p">)</span> <span class="ow">or</span>
<span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'get_compiler'</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">relabeled_clone</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">relabels</span><span class="p">):</span>
<span class="n">new</span> <span class="o">=</span> <span class="n">copy</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="n">new</span><span class="o">.</span><span class="n">lhs</span> <span class="o">=</span> <span class="n">new</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">relabeled_clone</span><span class="p">(</span><span class="n">relabels</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">new</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'relabeled_clone'</span><span class="p">):</span>
<span class="n">new</span><span class="o">.</span><span class="n">rhs</span> <span class="o">=</span> <span class="n">new</span><span class="o">.</span><span class="n">rhs</span><span class="o">.</span><span class="n">relabeled_clone</span><span class="p">(</span><span class="n">relabels</span><span class="p">)</span>
<span class="k">return</span> <span class="n">new</span>
<span class="k">def</span> <span class="nf">get_group_by_cols</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">cols</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">get_group_by_cols</span><span class="p">()</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'get_group_by_cols'</span><span class="p">):</span>
<span class="n">cols</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="o">.</span><span class="n">get_group_by_cols</span><span class="p">())</span>
<span class="k">return</span> <span class="n">cols</span>
<span class="k">def</span> <span class="nf">as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">NotImplementedError</span>
<span class="nd">@cached_property</span>
<span class="k">def</span> <span class="nf">contains_aggregate</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">contains_aggregate</span> <span class="ow">or</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'contains_aggregate'</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">is_summary</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">is_summary</span> <span class="ow">or</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'is_summary'</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span></div>
<div class="viewcode-block" id="Transform"><a class="viewcode-back" href="../../../../ref/models/lookups.html#django.db.models.Transform">[docs]</a><span class="k">class</span> <span class="nc">Transform</span><span class="p">(</span><span class="n">RegisterLookupMixin</span><span class="p">,</span> <span class="n">Func</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> RegisterLookupMixin() is first so that get_lookup() and get_transform()</span>
<span class="sd"> first examine self and then check output_field.</span>
<span class="sd"> """</span>
<span class="n">bilateral</span> <span class="o">=</span> <span class="kc">False</span>
<span class="n">arity</span> <span class="o">=</span> <span class="mi">1</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">lhs</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_expressions</span><span class="p">()[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">get_bilateral_transforms</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="p">,</span> <span class="s1">'get_bilateral_transforms'</span><span class="p">):</span>
<span class="n">bilateral_transforms</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">get_bilateral_transforms</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">bilateral_transforms</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral</span><span class="p">:</span>
<span class="n">bilateral_transforms</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="p">)</span>
<span class="k">return</span> <span class="n">bilateral_transforms</span></div>
<span class="k">class</span> <span class="nc">BuiltinLookup</span><span class="p">(</span><span class="n">Lookup</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">process_lhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">lhs</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">lhs_sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">BuiltinLookup</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_lhs</span><span class="p">(</span>
<span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">lhs</span><span class="p">)</span>
<span class="n">field_internal_type</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="o">.</span><span class="n">get_internal_type</span><span class="p">()</span>
<span class="n">db_type</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="o">.</span><span class="n">db_type</span><span class="p">(</span><span class="n">connection</span><span class="o">=</span><span class="n">connection</span><span class="p">)</span>
<span class="n">lhs_sql</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">field_cast_sql</span><span class="p">(</span>
<span class="n">db_type</span><span class="p">,</span> <span class="n">field_internal_type</span><span class="p">)</span> <span class="o">%</span> <span class="n">lhs_sql</span>
<span class="n">lhs_sql</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">lookup_cast</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lookup_name</span><span class="p">,</span> <span class="n">field_internal_type</span><span class="p">)</span> <span class="o">%</span> <span class="n">lhs_sql</span>
<span class="k">return</span> <span class="n">lhs_sql</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="n">params</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">lhs_sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_lhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">rhs_sql</span><span class="p">,</span> <span class="n">rhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">params</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">rhs_params</span><span class="p">)</span>
<span class="n">rhs_sql</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_rhs_op</span><span class="p">(</span><span class="n">connection</span><span class="p">,</span> <span class="n">rhs_sql</span><span class="p">)</span>
<span class="k">return</span> <span class="s1">'</span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">lhs_sql</span><span class="p">,</span> <span class="n">rhs_sql</span><span class="p">),</span> <span class="n">params</span>
<span class="k">def</span> <span class="nf">get_rhs_op</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">connection</span><span class="o">.</span><span class="n">operators</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">lookup_name</span><span class="p">]</span> <span class="o">%</span> <span class="n">rhs</span>
<span class="k">class</span> <span class="nc">FieldGetDbPrepValueMixin</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Some lookups require Field.get_db_prep_value() to be called on their</span>
<span class="sd"> inputs.</span>
<span class="sd"> """</span>
<span class="n">get_db_prep_lookup_value_is_iterable</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">get_db_prep_lookup</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="c1"># For relational fields, use the output_field of the 'field' attribute.</span>
<span class="n">field</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="p">,</span> <span class="s1">'field'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="n">get_db_prep_value</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">field</span><span class="p">,</span> <span class="s1">'get_db_prep_value'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">get_db_prep_value</span><span class="p">:</span>
<span class="n">get_db_prep_value</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="o">.</span><span class="n">get_db_prep_value</span>
<span class="k">return</span> <span class="p">(</span>
<span class="s1">'</span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span>
<span class="p">[</span><span class="n">get_db_prep_value</span><span class="p">(</span><span class="n">v</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">prepared</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> <span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">value</span><span class="p">]</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_db_prep_lookup_value_is_iterable</span> <span class="k">else</span>
<span class="p">[</span><span class="n">get_db_prep_value</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">prepared</span><span class="o">=</span><span class="kc">True</span><span class="p">)]</span>
<span class="p">)</span>
<span class="k">class</span> <span class="nc">FieldGetDbPrepValueIterableMixin</span><span class="p">(</span><span class="n">FieldGetDbPrepValueMixin</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Some lookups require Field.get_db_prep_value() to be called on each value</span>
<span class="sd"> in an iterable.</span>
<span class="sd"> """</span>
<span class="n">get_db_prep_lookup_value_is_iterable</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">def</span> <span class="nf">get_prep_lookup</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">prepared_values</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'_prepare'</span><span class="p">):</span>
<span class="c1"># A subquery is like an iterable but its items shouldn't be</span>
<span class="c1"># prepared independently.</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="o">.</span><span class="n">_prepare</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="p">)</span>
<span class="k">for</span> <span class="n">rhs_value</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">rhs_value</span><span class="p">,</span> <span class="s1">'resolve_expression'</span><span class="p">):</span>
<span class="c1"># An expression will be handled by the database but can coexist</span>
<span class="c1"># alongside real values.</span>
<span class="k">pass</span>
<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">prepare_rhs</span> <span class="ow">and</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="p">,</span> <span class="s1">'get_prep_value'</span><span class="p">):</span>
<span class="n">rhs_value</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span><span class="o">.</span><span class="n">get_prep_value</span><span class="p">(</span><span class="n">rhs_value</span><span class="p">)</span>
<span class="n">prepared_values</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">rhs_value</span><span class="p">)</span>
<span class="k">return</span> <span class="n">prepared_values</span>
<span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs_is_direct_value</span><span class="p">():</span>
<span class="c1"># rhs should be an iterable of values. Use batch_process_rhs()</span>
<span class="c1"># to prepare/transform those values.</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">batch_process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">FieldGetDbPrepValueIterableMixin</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">resolve_expression_parameter</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">sql</span><span class="p">,</span> <span class="n">param</span><span class="p">):</span>
<span class="n">params</span> <span class="o">=</span> <span class="p">[</span><span class="n">param</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">param</span><span class="p">,</span> <span class="s1">'resolve_expression'</span><span class="p">):</span>
<span class="n">param</span> <span class="o">=</span> <span class="n">param</span><span class="o">.</span><span class="n">resolve_expression</span><span class="p">(</span><span class="n">compiler</span><span class="o">.</span><span class="n">query</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">param</span><span class="p">,</span> <span class="s1">'as_sql'</span><span class="p">):</span>
<span class="n">sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="n">param</span><span class="o">.</span><span class="n">as_sql</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">return</span> <span class="n">sql</span><span class="p">,</span> <span class="n">params</span>
<span class="k">def</span> <span class="nf">batch_process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">pre_processed</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">FieldGetDbPrepValueIterableMixin</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">batch_process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="p">)</span>
<span class="c1"># The params list may contain expressions which compile to a</span>
<span class="c1"># sql/param pair. Zip them to get sql and param pairs that refer to the</span>
<span class="c1"># same argument and attempt to replace them with the result of</span>
<span class="c1"># compiling the param step.</span>
<span class="n">sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="nb">zip</span><span class="p">(</span><span class="o">*</span><span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">resolve_expression_parameter</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">sql</span><span class="p">,</span> <span class="n">param</span><span class="p">)</span>
<span class="k">for</span> <span class="n">sql</span><span class="p">,</span> <span class="n">param</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="o">*</span><span class="n">pre_processed</span><span class="p">)</span>
<span class="p">))</span>
<span class="n">params</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="o">.</span><span class="n">from_iterable</span><span class="p">(</span><span class="n">params</span><span class="p">)</span>
<span class="k">return</span> <span class="n">sql</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">params</span><span class="p">)</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">Exact</span><span class="p">(</span><span class="n">FieldGetDbPrepValueMixin</span><span class="p">,</span> <span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'exact'</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">IExact</span><span class="p">(</span><span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'iexact'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">IExact</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">if</span> <span class="n">params</span><span class="p">:</span>
<span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">prep_for_iexact_query</span><span class="p">(</span><span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">return</span> <span class="n">rhs</span><span class="p">,</span> <span class="n">params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">GreaterThan</span><span class="p">(</span><span class="n">FieldGetDbPrepValueMixin</span><span class="p">,</span> <span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'gt'</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">GreaterThanOrEqual</span><span class="p">(</span><span class="n">FieldGetDbPrepValueMixin</span><span class="p">,</span> <span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'gte'</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">LessThan</span><span class="p">(</span><span class="n">FieldGetDbPrepValueMixin</span><span class="p">,</span> <span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'lt'</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">LessThanOrEqual</span><span class="p">(</span><span class="n">FieldGetDbPrepValueMixin</span><span class="p">,</span> <span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'lte'</span>
<span class="k">class</span> <span class="nc">IntegerFieldFloatRounding</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Allow floats to work as query values for IntegerField. Without this, the</span>
<span class="sd"> decimal portion of the float would always be discarded.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="nf">get_prep_lookup</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="nb">float</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rhs</span> <span class="o">=</span> <span class="n">math</span><span class="o">.</span><span class="n">ceil</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">IntegerFieldFloatRounding</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">get_prep_lookup</span><span class="p">()</span>
<span class="nd">@IntegerField</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">IntegerGreaterThanOrEqual</span><span class="p">(</span><span class="n">IntegerFieldFloatRounding</span><span class="p">,</span> <span class="n">GreaterThanOrEqual</span><span class="p">):</span>
<span class="k">pass</span>
<span class="nd">@IntegerField</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">IntegerLessThan</span><span class="p">(</span><span class="n">IntegerFieldFloatRounding</span><span class="p">,</span> <span class="n">LessThan</span><span class="p">):</span>
<span class="k">pass</span>
<span class="k">class</span> <span class="nc">DecimalComparisonLookup</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">as_sqlite</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">lhs_sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_lhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">rhs_sql</span><span class="p">,</span> <span class="n">rhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">params</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">rhs_params</span><span class="p">)</span>
<span class="c1"># For comparisons whose lhs is a DecimalField, cast rhs AS NUMERIC</span>
<span class="c1"># because the rhs will have been converted to a string by the</span>
<span class="c1"># rev_typecast_decimal() adapter.</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="n">Decimal</span><span class="p">):</span>
<span class="n">rhs_sql</span> <span class="o">=</span> <span class="s1">'CAST(</span><span class="si">%s</span><span class="s1"> AS NUMERIC)'</span> <span class="o">%</span> <span class="n">rhs_sql</span>
<span class="n">rhs_sql</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_rhs_op</span><span class="p">(</span><span class="n">connection</span><span class="p">,</span> <span class="n">rhs_sql</span><span class="p">)</span>
<span class="k">return</span> <span class="s1">'</span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">lhs_sql</span><span class="p">,</span> <span class="n">rhs_sql</span><span class="p">),</span> <span class="n">params</span>
<span class="nd">@DecimalField</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">DecimalGreaterThan</span><span class="p">(</span><span class="n">DecimalComparisonLookup</span><span class="p">,</span> <span class="n">GreaterThan</span><span class="p">):</span>
<span class="k">pass</span>
<span class="nd">@DecimalField</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">DecimalGreaterThanOrEqual</span><span class="p">(</span><span class="n">DecimalComparisonLookup</span><span class="p">,</span> <span class="n">GreaterThanOrEqual</span><span class="p">):</span>
<span class="k">pass</span>
<span class="nd">@DecimalField</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">DecimalLessThan</span><span class="p">(</span><span class="n">DecimalComparisonLookup</span><span class="p">,</span> <span class="n">LessThan</span><span class="p">):</span>
<span class="k">pass</span>
<span class="nd">@DecimalField</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">DecimalLessThanOrEqual</span><span class="p">(</span><span class="n">DecimalComparisonLookup</span><span class="p">,</span> <span class="n">LessThanOrEqual</span><span class="p">):</span>
<span class="k">pass</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">In</span><span class="p">(</span><span class="n">FieldGetDbPrepValueIterableMixin</span><span class="p">,</span> <span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'in'</span>
<span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">db_rhs</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'_db'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">db_rhs</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">db_rhs</span> <span class="o">!=</span> <span class="n">connection</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
<span class="s2">"Subqueries aren't allowed across different databases. Force "</span>
<span class="s2">"the inner query to be evaluated using `list(inner_query)`."</span>
<span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs_is_direct_value</span><span class="p">():</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">rhs</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">TypeError</span><span class="p">:</span> <span class="c1"># Unhashable items in self.rhs</span>
<span class="n">rhs</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">rhs</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">EmptyResultSet</span>
<span class="c1"># rhs should be an iterable; use batch_process_rhs() to</span>
<span class="c1"># prepare/transform those values.</span>
<span class="n">sqls</span><span class="p">,</span> <span class="n">sqls_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">batch_process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="p">)</span>
<span class="n">placeholder</span> <span class="o">=</span> <span class="s1">'('</span> <span class="o">+</span> <span class="s1">', '</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">sqls</span><span class="p">)</span> <span class="o">+</span> <span class="s1">')'</span>
<span class="k">return</span> <span class="p">(</span><span class="n">placeholder</span><span class="p">,</span> <span class="n">sqls_params</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">In</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_rhs_op</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span>
<span class="k">return</span> <span class="s1">'IN </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">rhs</span>
<span class="k">def</span> <span class="nf">as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">max_in_list_size</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">max_in_list_size</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs_is_direct_value</span><span class="p">()</span> <span class="ow">and</span> <span class="n">max_in_list_size</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">)</span> <span class="o">></span> <span class="n">max_in_list_size</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">split_parameter_list_as_sql</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">In</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">as_sql</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">split_parameter_list_as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="c1"># This is a special case for databases which limit the number of</span>
<span class="c1"># elements which can appear in an 'IN' clause.</span>
<span class="n">max_in_list_size</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">max_in_list_size</span><span class="p">()</span>
<span class="n">lhs</span><span class="p">,</span> <span class="n">lhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_lhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">rhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">batch_process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">in_clause_elements</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'('</span><span class="p">]</span>
<span class="n">params</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">offset</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">rhs_params</span><span class="p">),</span> <span class="n">max_in_list_size</span><span class="p">):</span>
<span class="k">if</span> <span class="n">offset</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
<span class="n">in_clause_elements</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">' OR '</span><span class="p">)</span>
<span class="n">in_clause_elements</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">'</span><span class="si">%s</span><span class="s1"> IN ('</span> <span class="o">%</span> <span class="n">lhs</span><span class="p">)</span>
<span class="n">params</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">lhs_params</span><span class="p">)</span>
<span class="n">sqls</span> <span class="o">=</span> <span class="n">rhs</span><span class="p">[</span><span class="n">offset</span><span class="p">:</span> <span class="n">offset</span> <span class="o">+</span> <span class="n">max_in_list_size</span><span class="p">]</span>
<span class="n">sqls_params</span> <span class="o">=</span> <span class="n">rhs_params</span><span class="p">[</span><span class="n">offset</span><span class="p">:</span> <span class="n">offset</span> <span class="o">+</span> <span class="n">max_in_list_size</span><span class="p">]</span>
<span class="n">param_group</span> <span class="o">=</span> <span class="s1">', '</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">sqls</span><span class="p">)</span>
<span class="n">in_clause_elements</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">param_group</span><span class="p">)</span>
<span class="n">in_clause_elements</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">')'</span><span class="p">)</span>
<span class="n">params</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">sqls_params</span><span class="p">)</span>
<span class="n">in_clause_elements</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">')'</span><span class="p">)</span>
<span class="k">return</span> <span class="s1">''</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">in_clause_elements</span><span class="p">),</span> <span class="n">params</span>
<span class="k">class</span> <span class="nc">PatternLookup</span><span class="p">(</span><span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">get_rhs_op</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span>
<span class="c1"># Assume we are in startswith. We need to produce SQL like:</span>
<span class="c1"># col LIKE %s, ['thevalue%']</span>
<span class="c1"># For python values we can (and should) do that directly in Python,</span>
<span class="c1"># but if the value is for example reference to other column, then</span>
<span class="c1"># we need to add the % pattern match to the lookup by something like</span>
<span class="c1"># col LIKE othercol || '%%'</span>
<span class="c1"># So, for Python values we don't need any special pattern, but for</span>
<span class="c1"># SQL reference values or SQL transformations we need the correct</span>
<span class="c1"># pattern added.</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'get_compiler'</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">,</span> <span class="s1">'as_sql'</span><span class="p">)</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="n">pattern</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">pattern_ops</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">lookup_name</span><span class="p">]</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">connection</span><span class="o">.</span><span class="n">pattern_esc</span><span class="p">)</span>
<span class="k">return</span> <span class="n">pattern</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">rhs</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">PatternLookup</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">get_rhs_op</span><span class="p">(</span><span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="p">)</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">Contains</span><span class="p">(</span><span class="n">PatternLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'contains'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">Contains</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">if</span> <span class="n">params</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%%%s%%</span><span class="s2">"</span> <span class="o">%</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">prep_for_like_query</span><span class="p">(</span><span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">return</span> <span class="n">rhs</span><span class="p">,</span> <span class="n">params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">IContains</span><span class="p">(</span><span class="n">Contains</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'icontains'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">StartsWith</span><span class="p">(</span><span class="n">PatternLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'startswith'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">StartsWith</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">if</span> <span class="n">params</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s%%</span><span class="s2">"</span> <span class="o">%</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">prep_for_like_query</span><span class="p">(</span><span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">return</span> <span class="n">rhs</span><span class="p">,</span> <span class="n">params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">IStartsWith</span><span class="p">(</span><span class="n">PatternLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'istartswith'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">IStartsWith</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">if</span> <span class="n">params</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s%%</span><span class="s2">"</span> <span class="o">%</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">prep_for_like_query</span><span class="p">(</span><span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">return</span> <span class="n">rhs</span><span class="p">,</span> <span class="n">params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">EndsWith</span><span class="p">(</span><span class="n">PatternLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'endswith'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">EndsWith</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">if</span> <span class="n">params</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%%%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">prep_for_like_query</span><span class="p">(</span><span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">return</span> <span class="n">rhs</span><span class="p">,</span> <span class="n">params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">IEndsWith</span><span class="p">(</span><span class="n">PatternLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'iendswith'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">process_rhs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">IEndsWith</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">qn</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">if</span> <span class="n">params</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">bilateral_transforms</span><span class="p">:</span>
<span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%%%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">prep_for_like_query</span><span class="p">(</span><span class="n">params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">return</span> <span class="n">rhs</span><span class="p">,</span> <span class="n">params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">Range</span><span class="p">(</span><span class="n">FieldGetDbPrepValueIterableMixin</span><span class="p">,</span> <span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'range'</span>
<span class="k">def</span> <span class="nf">get_rhs_op</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span>
<span class="k">return</span> <span class="s2">"BETWEEN </span><span class="si">%s</span><span class="s2"> AND </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">rhs</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">rhs</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">IsNull</span><span class="p">(</span><span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'isnull'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="n">compiler</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">rhs</span><span class="p">:</span>
<span class="k">return</span> <span class="s2">"</span><span class="si">%s</span><span class="s2"> IS NULL"</span> <span class="o">%</span> <span class="n">sql</span><span class="p">,</span> <span class="n">params</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="s2">"</span><span class="si">%s</span><span class="s2"> IS NOT NULL"</span> <span class="o">%</span> <span class="n">sql</span><span class="p">,</span> <span class="n">params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">Search</span><span class="p">(</span><span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'search'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
<span class="s1">'The `__search` lookup is deprecated. See the 1.10 release notes '</span>
<span class="s1">'for how to replace it.'</span><span class="p">,</span> <span class="n">RemovedInDjango20Warning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span>
<span class="p">)</span>
<span class="n">lhs</span><span class="p">,</span> <span class="n">lhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_lhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">rhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">sql_template</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">fulltext_search_sql</span><span class="p">(</span><span class="n">field_name</span><span class="o">=</span><span class="n">lhs</span><span class="p">)</span>
<span class="k">return</span> <span class="n">sql_template</span><span class="p">,</span> <span class="n">lhs_params</span> <span class="o">+</span> <span class="n">rhs_params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">Regex</span><span class="p">(</span><span class="n">BuiltinLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'regex'</span>
<span class="n">prepare_rhs</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">lookup_name</span> <span class="ow">in</span> <span class="n">connection</span><span class="o">.</span><span class="n">operators</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">Regex</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">as_sql</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">lhs</span><span class="p">,</span> <span class="n">lhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_lhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">rhs</span><span class="p">,</span> <span class="n">rhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">sql_template</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">regex_lookup</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lookup_name</span><span class="p">)</span>
<span class="k">return</span> <span class="n">sql_template</span> <span class="o">%</span> <span class="p">(</span><span class="n">lhs</span><span class="p">,</span> <span class="n">rhs</span><span class="p">),</span> <span class="n">lhs_params</span> <span class="o">+</span> <span class="n">rhs_params</span>
<span class="nd">@Field</span><span class="o">.</span><span class="n">register_lookup</span>
<span class="k">class</span> <span class="nc">IRegex</span><span class="p">(</span><span class="n">Regex</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'iregex'</span>
<span class="k">class</span> <span class="nc">YearLookup</span><span class="p">(</span><span class="n">Lookup</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">year_lookup_bounds</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">year</span><span class="p">):</span>
<span class="n">output_field</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">output_field</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">output_field</span><span class="p">,</span> <span class="n">DateTimeField</span><span class="p">):</span>
<span class="n">bounds</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">year_lookup_bounds_for_datetime_field</span><span class="p">(</span><span class="n">year</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">bounds</span> <span class="o">=</span> <span class="n">connection</span><span class="o">.</span><span class="n">ops</span><span class="o">.</span><span class="n">year_lookup_bounds_for_date_field</span><span class="p">(</span><span class="n">year</span><span class="p">)</span>
<span class="k">return</span> <span class="n">bounds</span>
<span class="k">class</span> <span class="nc">YearComparisonLookup</span><span class="p">(</span><span class="n">YearLookup</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="c1"># We will need to skip the extract part and instead go</span>
<span class="c1"># directly with the originating field, that is self.lhs.lhs.</span>
<span class="n">lhs_sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_lhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">lhs</span><span class="p">)</span>
<span class="n">rhs_sql</span><span class="p">,</span> <span class="n">rhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">rhs_sql</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_rhs_op</span><span class="p">(</span><span class="n">connection</span><span class="p">,</span> <span class="n">rhs_sql</span><span class="p">)</span>
<span class="n">start</span><span class="p">,</span> <span class="n">finish</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">year_lookup_bounds</span><span class="p">(</span><span class="n">connection</span><span class="p">,</span> <span class="n">rhs_params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="n">params</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">get_bound</span><span class="p">(</span><span class="n">start</span><span class="p">,</span> <span class="n">finish</span><span class="p">))</span>
<span class="k">return</span> <span class="s1">'</span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">lhs_sql</span><span class="p">,</span> <span class="n">rhs_sql</span><span class="p">),</span> <span class="n">params</span>
<span class="k">def</span> <span class="nf">get_rhs_op</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="n">rhs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">connection</span><span class="o">.</span><span class="n">operators</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">lookup_name</span><span class="p">]</span> <span class="o">%</span> <span class="n">rhs</span>
<span class="k">def</span> <span class="nf">get_bound</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">(</span>
<span class="s1">'subclasses of YearComparisonLookup must provide a get_bound() method'</span>
<span class="p">)</span>
<span class="k">class</span> <span class="nc">YearExact</span><span class="p">(</span><span class="n">YearLookup</span><span class="p">,</span> <span class="n">Exact</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'exact'</span>
<span class="k">def</span> <span class="nf">as_sql</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">):</span>
<span class="c1"># We will need to skip the extract part and instead go</span>
<span class="c1"># directly with the originating field, that is self.lhs.lhs.</span>
<span class="n">lhs_sql</span><span class="p">,</span> <span class="n">params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_lhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">lhs</span><span class="o">.</span><span class="n">lhs</span><span class="p">)</span>
<span class="n">rhs_sql</span><span class="p">,</span> <span class="n">rhs_params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_rhs</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="c1"># Check that rhs_params[0] exists (IndexError),</span>
<span class="c1"># it isn't None (TypeError), and is a number (ValueError)</span>
<span class="nb">int</span><span class="p">(</span><span class="n">rhs_params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">IndexError</span><span class="p">,</span> <span class="ne">TypeError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">):</span>
<span class="c1"># Can't determine the bounds before executing the query, so skip</span>
<span class="c1"># optimizations by falling back to a standard exact comparison.</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">Exact</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">as_sql</span><span class="p">(</span><span class="n">compiler</span><span class="p">,</span> <span class="n">connection</span><span class="p">)</span>
<span class="n">bounds</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">year_lookup_bounds</span><span class="p">(</span><span class="n">connection</span><span class="p">,</span> <span class="n">rhs_params</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="n">params</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">bounds</span><span class="p">)</span>
<span class="k">return</span> <span class="s1">'</span><span class="si">%s</span><span class="s1"> BETWEEN </span><span class="si">%%</span><span class="s1">s AND </span><span class="si">%%</span><span class="s1">s'</span> <span class="o">%</span> <span class="n">lhs_sql</span><span class="p">,</span> <span class="n">params</span>
<span class="k">class</span> <span class="nc">YearGt</span><span class="p">(</span><span class="n">YearComparisonLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'gt'</span>
<span class="k">def</span> <span class="nf">get_bound</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">start</span><span class="p">,</span> <span class="n">finish</span><span class="p">):</span>
<span class="k">return</span> <span class="n">finish</span>
<span class="k">class</span> <span class="nc">YearGte</span><span class="p">(</span><span class="n">YearComparisonLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'gte'</span>
<span class="k">def</span> <span class="nf">get_bound</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">start</span><span class="p">,</span> <span class="n">finish</span><span class="p">):</span>
<span class="k">return</span> <span class="n">start</span>
<span class="k">class</span> <span class="nc">YearLt</span><span class="p">(</span><span class="n">YearComparisonLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'lt'</span>
<span class="k">def</span> <span class="nf">get_bound</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">start</span><span class="p">,</span> <span class="n">finish</span><span class="p">):</span>
<span class="k">return</span> <span class="n">start</span>
<span class="k">class</span> <span class="nc">YearLte</span><span class="p">(</span><span class="n">YearComparisonLookup</span><span class="p">):</span>
<span class="n">lookup_name</span> <span class="o">=</span> <span class="s1">'lte'</span>
<span class="k">def</span> <span class="nf">get_bound</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">start</span><span class="p">,</span> <span class="n">finish</span><span class="p">):</span>
<span class="k">return</span> <span class="n">finish</span>
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