<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang=""> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>django.template.loader — Django 1.8.19 documentation</title> <link rel="stylesheet" href="../../../_static/default.css" type="text/css" /> <link rel="stylesheet" href="../../../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../../../', VERSION: '1.8.19', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../../../_static/jquery.js"></script> <script type="text/javascript" src="../../../_static/underscore.js"></script> <script type="text/javascript" src="../../../_static/doctools.js"></script> <link rel="index" title="Index" href="../../../genindex.html" /> <link rel="search" title="Search" href="../../../search.html" /> <link rel="top" title="Django 1.8.19 documentation" href="../../../contents.html" /> <link rel="up" title="django" href="../../django.html" /> <script type="text/javascript" src="../../../templatebuiltins.js"></script> <script type="text/javascript"> (function($) { if (!django_template_builtins) { // templatebuiltins.js missing, do nothing. return; } $(document).ready(function() { // Hyperlink Django template tags and filters var base = "../../../ref/templates/builtins.html"; if (base == "#") { // Special case for builtins.html itself base = ""; } // Tags are keywords, class '.k' $("div.highlight\\-html\\+django span.k").each(function(i, elem) { var tagname = $(elem).text(); if ($.inArray(tagname, django_template_builtins.ttags) != -1) { var fragment = tagname.replace(/_/, '-'); $(elem).html("<a href='" + base + "#" + fragment + "'>" + tagname + "</a>"); } }); // Filters are functions, class '.nf' $("div.highlight\\-html\\+django 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code for django.template.loader</h1><div class="highlight"><pre> <span></span><span class="kn">import</span> <span class="nn">warnings</span> <span class="kn">from</span> <span class="nn">django.utils.deprecation</span> <span class="k">import</span> <span class="n">RemovedInDjango110Warning</span> <span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">engines</span> <span class="kn">from</span> <span class="nn">.backends.django</span> <span class="k">import</span> <span class="n">DjangoTemplates</span> <span class="kn">from</span> <span class="nn">.base</span> <span class="k">import</span> <span class="n">Origin</span><span class="p">,</span> <span class="n">TemplateDoesNotExist</span> <span class="kn">from</span> <span class="nn">.engine</span> <span class="k">import</span> <span class="p">(</span> <span class="n">_context_instance_undefined</span><span class="p">,</span> <span class="n">_dictionary_undefined</span><span class="p">,</span> <span class="n">_dirs_undefined</span><span class="p">,</span> <span class="p">)</span> <span class="kn">from</span> <span class="nn">.loaders</span> <span class="k">import</span> <span class="n">base</span> <span class="k">class</span> <span class="nc">LoaderOrigin</span><span class="p">(</span><span class="n">Origin</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">display_name</span><span class="p">,</span> <span class="n">loader</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">dirs</span><span class="p">):</span> <span class="nb">super</span><span class="p">(</span><span class="n">LoaderOrigin</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">display_name</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">loader</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">loadname</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dirs</span> <span class="o">=</span> <span class="n">loader</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">dirs</span> <span class="k">def</span> <span class="nf">reload</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">loader</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">loadname</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dirs</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span> <div class="viewcode-block" id="get_template"><a class="viewcode-back" href="../../../topics/templates.html#django.template.get_template">[docs]</a><span class="k">def</span> <span class="nf">get_template</span><span class="p">(</span><span class="n">template_name</span><span class="p">,</span> <span class="n">dirs</span><span class="o">=</span><span class="n">_dirs_undefined</span><span class="p">,</span> <span class="n">using</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> Loads and returns a template for the given name.</span> <span class="sd"> Raises TemplateDoesNotExist if no such template exists.</span> <span class="sd"> """</span> <span class="n">engines</span> <span class="o">=</span> <span class="n">_engine_list</span><span class="p">(</span><span class="n">using</span><span class="p">)</span> <span class="k">for</span> <span class="n">engine</span> <span class="ow">in</span> <span class="n">engines</span><span class="p">:</span> <span class="k">try</span><span class="p">:</span> <span class="c1"># This is required for deprecating the dirs argument. Simply</span> <span class="c1"># return engine.get_template(template_name) in Django 1.10.</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">engine</span><span class="p">,</span> <span class="n">DjangoTemplates</span><span class="p">):</span> <span class="k">return</span> <span class="n">engine</span><span class="o">.</span><span class="n">get_template</span><span class="p">(</span><span class="n">template_name</span><span class="p">,</span> <span class="n">dirs</span><span class="p">)</span> <span class="k">elif</span> <span class="n">dirs</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">_dirs_undefined</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="s2">"Skipping template backend </span><span class="si">%s</span><span class="s2"> because its get_template "</span> <span class="s2">"method doesn't support the dirs argument."</span> <span class="o">%</span> <span class="n">engine</span><span class="o">.</span><span class="n">name</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="k">else</span><span class="p">:</span> <span class="k">return</span> <span class="n">engine</span><span class="o">.</span><span class="n">get_template</span><span class="p">(</span><span class="n">template_name</span><span class="p">)</span> <span class="k">except</span> <span class="n">TemplateDoesNotExist</span><span class="p">:</span> <span class="k">pass</span> <span class="k">raise</span> <span class="n">TemplateDoesNotExist</span><span class="p">(</span><span class="n">template_name</span><span class="p">)</span></div> <div class="viewcode-block" id="select_template"><a class="viewcode-back" href="../../../topics/templates.html#django.template.select_template">[docs]</a><span class="k">def</span> <span class="nf">select_template</span><span class="p">(</span><span class="n">template_name_list</span><span class="p">,</span> <span class="n">dirs</span><span class="o">=</span><span class="n">_dirs_undefined</span><span class="p">,</span> <span class="n">using</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> Loads and returns a template for one of the given names.</span> <span class="sd"> Tries names in order and returns the first template found.</span> <span class="sd"> Raises TemplateDoesNotExist if no such template exists.</span> <span class="sd"> """</span> <span class="n">engines</span> <span class="o">=</span> <span class="n">_engine_list</span><span class="p">(</span><span class="n">using</span><span class="p">)</span> <span class="k">for</span> <span class="n">template_name</span> <span class="ow">in</span> <span class="n">template_name_list</span><span class="p">:</span> <span class="k">for</span> <span class="n">engine</span> <span class="ow">in</span> <span class="n">engines</span><span class="p">:</span> <span class="k">try</span><span class="p">:</span> <span class="c1"># This is required for deprecating the dirs argument. Simply</span> <span class="c1"># use engine.get_template(template_name) in Django 1.10.</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">engine</span><span class="p">,</span> <span class="n">DjangoTemplates</span><span class="p">):</span> <span class="k">return</span> <span class="n">engine</span><span class="o">.</span><span class="n">get_template</span><span class="p">(</span><span class="n">template_name</span><span class="p">,</span> <span class="n">dirs</span><span class="p">)</span> <span class="k">elif</span> <span class="n">dirs</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">_dirs_undefined</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="s2">"Skipping template backend </span><span class="si">%s</span><span class="s2"> because its get_template "</span> <span class="s2">"method doesn't support the dirs argument."</span> <span class="o">%</span> <span class="n">engine</span><span class="o">.</span><span class="n">name</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="k">else</span><span class="p">:</span> <span class="k">return</span> <span class="n">engine</span><span class="o">.</span><span class="n">get_template</span><span class="p">(</span><span class="n">template_name</span><span class="p">)</span> <span class="k">except</span> <span class="n">TemplateDoesNotExist</span><span class="p">:</span> <span class="k">pass</span> <span class="k">if</span> <span class="n">template_name_list</span><span class="p">:</span> <span class="k">raise</span> <span class="n">TemplateDoesNotExist</span><span class="p">(</span><span class="s1">', '</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">template_name_list</span><span class="p">))</span> <span class="k">else</span><span class="p">:</span> <span class="k">raise</span> <span class="n">TemplateDoesNotExist</span><span class="p">(</span><span class="s2">"No template names provided"</span><span class="p">)</span></div> <div class="viewcode-block" id="render_to_string"><a class="viewcode-back" href="../../../topics/templates.html#django.template.render_to_string">[docs]</a><span class="k">def</span> <span class="nf">render_to_string</span><span class="p">(</span><span class="n">template_name</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">context_instance</span><span class="o">=</span><span class="n">_context_instance_undefined</span><span class="p">,</span> <span class="n">dirs</span><span class="o">=</span><span class="n">_dirs_undefined</span><span class="p">,</span> <span class="n">dictionary</span><span class="o">=</span><span class="n">_dictionary_undefined</span><span class="p">,</span> <span class="n">request</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">using</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> Loads a template and renders it with a context. Returns a string.</span> <span class="sd"> template_name may be a string or a list of strings.</span> <span class="sd"> """</span> <span class="k">if</span> <span class="p">(</span><span class="n">context_instance</span> <span class="ow">is</span> <span class="n">_context_instance_undefined</span> <span class="ow">and</span> <span class="n">dirs</span> <span class="ow">is</span> <span class="n">_dirs_undefined</span> <span class="ow">and</span> <span class="n">dictionary</span> <span class="ow">is</span> <span class="n">_dictionary_undefined</span><span class="p">):</span> <span class="c1"># No deprecated arguments were passed - use the new code path</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">template_name</span><span class="p">,</span> <span class="p">(</span><span class="nb">list</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">)):</span> <span class="n">template</span> <span class="o">=</span> <span class="n">select_template</span><span class="p">(</span><span class="n">template_name</span><span class="p">,</span> <span class="n">using</span><span class="o">=</span><span class="n">using</span><span class="p">)</span> <span class="k">else</span><span class="p">:</span> <span class="n">template</span> <span class="o">=</span> <span class="n">get_template</span><span class="p">(</span><span class="n">template_name</span><span class="p">,</span> <span class="n">using</span><span class="o">=</span><span class="n">using</span><span class="p">)</span> <span class="k">return</span> <span class="n">template</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">request</span><span class="p">)</span> <span class="k">else</span><span class="p">:</span> <span class="c1"># Some deprecated arguments were passed - use the legacy code path</span> <span class="k">for</span> <span class="n">engine</span> <span class="ow">in</span> <span class="n">_engine_list</span><span class="p">(</span><span class="n">using</span><span class="p">):</span> <span class="k">try</span><span class="p">:</span> <span class="c1"># This is required for deprecating properly arguments specific</span> <span class="c1"># to Django templates. Remove Engine.render_to_string() at the</span> <span class="c1"># same time as this code path in Django 1.10.</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">engine</span><span class="p">,</span> <span class="n">DjangoTemplates</span><span class="p">):</span> <span class="k">if</span> <span class="n">request</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> <span class="s2">"render_to_string doesn't support the request argument "</span> <span class="s2">"when some deprecated arguments are passed."</span><span class="p">)</span> <span class="c1"># Hack -- use the internal Engine instance of DjangoTemplates.</span> <span class="k">return</span> <span class="n">engine</span><span class="o">.</span><span class="n">engine</span><span class="o">.</span><span class="n">render_to_string</span><span class="p">(</span> <span class="n">template_name</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">context_instance</span><span class="p">,</span> <span class="n">dirs</span><span class="p">,</span> <span class="n">dictionary</span><span class="p">)</span> <span class="k">elif</span> <span class="n">context_instance</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">_context_instance_undefined</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="s2">"Skipping template backend </span><span class="si">%s</span><span class="s2"> because its render_to_string "</span> <span class="s2">"method doesn't support the context_instance argument."</span> <span class="o">%</span> <span class="n">engine</span><span class="o">.</span><span class="n">name</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="k">elif</span> <span class="n">dirs</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">_dirs_undefined</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="s2">"Skipping template backend </span><span class="si">%s</span><span class="s2"> because its render_to_string "</span> <span class="s2">"method doesn't support the dirs argument."</span> <span class="o">%</span> <span class="n">engine</span><span class="o">.</span><span class="n">name</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="k">elif</span> <span class="n">dictionary</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">_dictionary_undefined</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="s2">"Skipping template backend </span><span class="si">%s</span><span class="s2"> because its render_to_string "</span> <span class="s2">"method doesn't support the dictionary argument."</span> <span class="o">%</span> <span class="n">engine</span><span class="o">.</span><span class="n">name</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="k">except</span> <span class="n">TemplateDoesNotExist</span><span class="p">:</span> <span class="k">continue</span> <span class="k">if</span> <span class="n">template_name</span><span class="p">:</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">template_name</span><span class="p">,</span> <span class="p">(</span><span class="nb">list</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">)):</span> <span class="n">template_name</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">template_name</span><span class="p">)</span> <span class="k">raise</span> <span class="n">TemplateDoesNotExist</span><span class="p">(</span><span class="n">template_name</span><span class="p">)</span> <span class="k">else</span><span class="p">:</span> <span class="k">raise</span> <span class="n">TemplateDoesNotExist</span><span class="p">(</span><span class="s2">"No template names provided"</span><span class="p">)</span></div> <span class="k">def</span> <span class="nf">_engine_list</span><span class="p">(</span><span class="n">using</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="k">return</span> <span class="n">engines</span><span class="o">.</span><span class="n">all</span><span class="p">()</span> <span class="k">if</span> <span class="n">using</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="p">[</span><span class="n">engines</span><span class="p">[</span><span class="n">using</span><span class="p">]]</span> <span class="k">class</span> <span class="nc">BaseLoader</span><span class="p">(</span><span class="n">base</span><span class="o">.</span><span class="n">Loader</span><span class="p">):</span> <span class="n">_accepts_engine_in_init</span> <span class="o">=</span> <span class="kc">False</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="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</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="s2">"django.template.loader.BaseLoader was superseded by "</span> <span class="s2">"django.template.loaders.base.Loader."</span><span class="p">,</span> <span class="n">RemovedInDjango110Warning</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="nb">super</span><span class="p">(</span><span class="n">BaseLoader</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> </pre></div> </div> </div> </div> <div class="yui-b" id="sidebar"> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3>Browse</h3> <ul> </ul> <h3>You are here:</h3> <ul> <li> <a 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