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<h1>Source code for sqlobject.constraints</h1><div class="highlight"><pre>
<span></span><span class="sd">"""</span>
<span class="sd">Constraints</span>
<span class="sd">"""</span>
<span class="kn">from</span> <span class="nn">sqlobject.compat</span> <span class="k">import</span> <span class="n">PY2</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">PY2</span><span class="p">:</span>
<span class="c1"># alias for python 3 compatability</span>
<span class="n">long</span> <span class="o">=</span> <span class="nb">int</span>
<div class="viewcode-block" id="BadValue"><a class="viewcode-back" href="../../api/sqlobject.constraints.html#sqlobject.constraints.BadValue">[docs]</a><span class="k">class</span> <span class="nc">BadValue</span><span class="p">(</span><span class="ne">ValueError</span><span class="p">):</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">desc</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">desc</span> <span class="o">=</span> <span class="n">desc</span>
<span class="bp">self</span><span class="o">.</span><span class="n">col</span> <span class="o">=</span> <span class="n">col</span>
<span class="c1"># I want these objects to be garbage-collectable, so</span>
<span class="c1"># I just keep their repr:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">obj</span> <span class="o">=</span> <span class="nb">repr</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="nb">repr</span><span class="p">(</span><span class="n">value</span><span class="p">)</span>
<span class="n">fullDesc</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">.</span><span class="si">%s</span><span class="s2"> </span><span class="si">%s</span><span class="s2"> (you gave: </span><span class="si">%s</span><span class="s2">)"</span> \
<span class="o">%</span> <span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">desc</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
<span class="ne">ValueError</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fullDesc</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="isString"><a class="viewcode-back" href="../../api/sqlobject.constraints.html#sqlobject.constraints.isString">[docs]</a><span class="k">def</span> <span class="nf">isString</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">BadValue</span><span class="p">(</span><span class="s2">"only allows strings"</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="notNull"><a class="viewcode-back" href="../../api/sqlobject.constraints.html#sqlobject.constraints.notNull">[docs]</a><span class="k">def</span> <span class="nf">notNull</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">if</span> <span class="n">value</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">BadValue</span><span class="p">(</span><span class="s2">"is defined NOT NULL"</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="isInt"><a class="viewcode-back" href="../../api/sqlobject.constraints.html#sqlobject.constraints.isInt">[docs]</a><span class="k">def</span> <span class="nf">isInt</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="p">(</span><span class="nb">int</span><span class="p">,</span> <span class="n">long</span><span class="p">)):</span>
<span class="k">raise</span> <span class="n">BadValue</span><span class="p">(</span><span class="s2">"only allows integers"</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="isFloat"><a class="viewcode-back" href="../../api/sqlobject.constraints.html#sqlobject.constraints.isFloat">[docs]</a><span class="k">def</span> <span class="nf">isFloat</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="p">(</span><span class="nb">int</span><span class="p">,</span> <span class="n">long</span><span class="p">,</span> <span class="nb">float</span><span class="p">)):</span>
<span class="k">raise</span> <span class="n">BadValue</span><span class="p">(</span><span class="s2">"only allows floating point numbers"</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="isBool"><a class="viewcode-back" href="../../api/sqlobject.constraints.html#sqlobject.constraints.isBool">[docs]</a><span class="k">def</span> <span class="nf">isBool</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="nb">bool</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">BadValue</span><span class="p">(</span><span class="s2">"only allows booleans"</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="InList"><a class="viewcode-back" href="../../api/sqlobject.constraints.html#sqlobject.constraints.InList">[docs]</a><span class="k">class</span> <span class="nc">InList</span><span class="p">:</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">l</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">list</span> <span class="o">=</span> <span class="n">l</span>
<span class="k">def</span> <span class="nf">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">if</span> <span class="n">value</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">list</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">BadValue</span><span class="p">(</span><span class="s2">"accepts only values in </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="nb">repr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">list</span><span class="p">),</span>
<span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="MaxLength"><a class="viewcode-back" href="../../api/sqlobject.constraints.html#sqlobject.constraints.MaxLength">[docs]</a><span class="k">class</span> <span class="nc">MaxLength</span><span class="p">:</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">length</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">length</span> <span class="o">=</span> <span class="n">length</span>
<span class="k">def</span> <span class="nf">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">length</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">value</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">TypeError</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">BadValue</span><span class="p">(</span><span class="s2">"object does not have a length"</span><span class="p">,</span>
<span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
<span class="k">if</span> <span class="n">length</span> <span class="o">></span> <span class="bp">self</span><span class="o">.</span><span class="n">length</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">BadValue</span><span class="p">(</span><span class="s2">"must be shorter in length than </span><span class="si">%s</span><span class="s2">"</span>
<span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">length</span><span class="p">,</span>
<span class="n">obj</span><span class="p">,</span> <span class="n">col</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
</pre></div></div>
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