<!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>Model class reference — 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="Models" href="index.html" /> <link rel="next" title="Model Meta options" href="options.html" /> <link rel="prev" title="Related objects reference" href="relations.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 = "../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 span.nf").each(function(i, elem) { var filtername = $(elem).text(); if ($.inArray(filtername, django_template_builtins.tfilters) != -1) { var fragment = filtername.replace(/_/, '-'); $(elem).html("<a href='" + base + "#" + fragment + "'>" + filtername + "</a>"); } }); }); })(jQuery); </script> </head> <body role="document"> <div class="document"> <div id="custom-doc" class="yui-t6"> <div id="hd"> <h1><a href="../../index.html">Django 1.8.19 documentation</a></h1> <div id="global-nav"> <a title="Home page" href="../../index.html">Home</a> | <a title="Table of contents" href="../../contents.html">Table of contents</a> | <a title="Global index" href="../../genindex.html">Index</a> | <a title="Module index" href="../../py-modindex.html">Modules</a> </div> <div class="nav"> « <a href="relations.html" title="Related objects reference">previous</a> | <a href="../index.html" title="API Reference" accesskey="U">up</a> | <a href="options.html" title="Model <code class="docutils literal"><span class="pre">Meta</span></code> options">next</a> »</div> </div> <div id="bd"> <div id="yui-main"> <div class="yui-b"> <div class="yui-g" id="ref-models-class"> <div class="section" id="s-model-class-reference"> <span id="model-class-reference"></span><h1>Model class reference<a class="headerlink" href="#model-class-reference" title="Permalink to this headline">¶</a></h1> <p>This document covers features of the <a class="reference internal" href="instances.html#django.db.models.Model" title="django.db.models.Model"><code class="xref py py-class docutils literal"><span class="pre">Model</span></code></a> class. For more information about models, see <a class="reference internal" href="index.html"><span class="doc">the complete list of Model reference guides</span></a>.</p> <div class="section" id="s-attributes"> <span id="attributes"></span><h2>Attributes<a class="headerlink" href="#attributes" title="Permalink to this headline">¶</a></h2> <div class="section" id="s-objects"> <span id="objects"></span><h3><code class="docutils literal"><span class="pre">objects</span></code><a class="headerlink" href="#objects" title="Permalink to this headline">¶</a></h3> <dl class="attribute"> <dt id="django.db.models.Model.objects"> <code class="descclassname">Model.</code><code class="descname">objects</code><a class="headerlink" href="#django.db.models.Model.objects" title="Permalink to this definition">¶</a></dt> <dd><p>Each non-abstract <a class="reference internal" href="instances.html#django.db.models.Model" title="django.db.models.Model"><code class="xref py py-class docutils literal"><span class="pre">Model</span></code></a> class must have a <a class="reference internal" href="../../topics/db/managers.html#django.db.models.Manager" title="django.db.models.Manager"><code class="xref py py-class docutils literal"><span class="pre">Manager</span></code></a> instance added to it. Django ensures that in your model class you have at least a default <code class="docutils literal"><span class="pre">Manager</span></code> specified. If you don’t add your own <code class="docutils literal"><span class="pre">Manager</span></code>, Django will add an attribute <code class="docutils literal"><span class="pre">objects</span></code> containing default <a class="reference internal" href="../../topics/db/managers.html#django.db.models.Manager" title="django.db.models.Manager"><code class="xref py py-class docutils literal"><span class="pre">Manager</span></code></a> instance. If you add your own <a class="reference internal" href="../../topics/db/managers.html#django.db.models.Manager" title="django.db.models.Manager"><code class="xref py py-class docutils literal"><span class="pre">Manager</span></code></a> instance attribute, the default one does not appear. Consider the following example:</p> <div class="highlight-default"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">django.db</span> <span class="k">import</span> <span class="n">models</span> <span class="k">class</span> <span class="nc">Person</span><span class="p">(</span><span class="n">models</span><span class="o">.</span><span class="n">Model</span><span class="p">):</span> <span class="c1"># Add manager with another name</span> <span class="n">people</span> <span class="o">=</span> <span class="n">models</span><span class="o">.</span><span class="n">Manager</span><span class="p">()</span> </pre></div> </div> <p>For more details on model managers see <a class="reference internal" href="../../topics/db/managers.html"><span class="doc">Managers</span></a> and <a class="reference internal" href="../../topics/db/queries.html#retrieving-objects"><span class="std std-ref">Retrieving objects</span></a>.</p> </dd></dl> </div> </div> </div> </div> </div> </div> <div class="yui-b" id="sidebar"> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3><a href="../../contents.html">Table Of Contents</a></h3> <ul> <li><a class="reference internal" href="#">Model class reference</a><ul> <li><a class="reference internal" href="#attributes">Attributes</a><ul> <li><a class="reference internal" href="#objects"><code class="docutils literal"><span class="pre">objects</span></code></a></li> </ul> </li> </ul> </li> </ul> <h3>Browse</h3> <ul> <li>Prev: <a href="relations.html">Related objects reference</a></li> <li>Next: <a href="options.html">Model <code class="docutils literal"><span class="pre">Meta</span></code> options</a></li> </ul> <h3>You are here:</h3> <ul> <li> <a href="../../index.html">Django 1.8.19 documentation</a> <ul><li><a href="../index.html">API Reference</a> <ul><li><a href="index.html">Models</a> <ul><li>Model class reference</li></ul> </li></ul></li></ul> </li> </ul> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../../_sources/ref/models/class.txt" rel="nofollow">Show Source</a></li> </ul> </div> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <form class="search" action="../../search.html" method="get"> <div><input type="text" name="q" /></div> <div><input type="submit" value="Go" /></div> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <h3>Last update:</h3> <p class="topless">Mar 10, 2018</p> </div> </div> <div id="ft"> <div class="nav"> « <a href="relations.html" title="Related objects reference">previous</a> | <a href="../index.html" title="API Reference" accesskey="U">up</a> | <a href="options.html" title="Model <code class="docutils literal"><span class="pre">Meta</span></code> options">next</a> »</div> </div> </div> <div class="clearer"></div> </div> </body> </html>