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diff --git a/user_guide/general/models.html b/user_guide/general/models.html deleted file mode 100644 index 1bd641388..000000000 --- a/user_guide/general/models.html +++ /dev/null @@ -1,686 +0,0 @@ - - -<!DOCTYPE html> -<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> -<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> -<head> - <meta charset="utf-8"> - <meta name="viewport" content="width=device-width, initial-scale=1.0"> - - <title>Models — CodeIgniter 3.1.5 documentation</title> - - - - - <link rel="shortcut icon" href="../_static/ci-icon.ico"/> - - - - <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'> - - - - - - - - - - <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> - - - - <link rel="top" title="CodeIgniter 3.1.5 documentation" href="../index.html"/> - <link rel="up" title="General 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src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> - </div> - </ul> - <hr/> -</div> - <div role="main" class="document"> - - <div class="section" id="models"> -<h1><a class="toc-backref" href="#id1">Models</a><a class="headerlink" href="#models" title="Permalink to this headline">¶</a></h1> -<p>Models are <strong>optionally</strong> available for those who want to use a more -traditional MVC approach.</p> -<div class="contents topic" id="page-contents"> -<p class="topic-title first">Page Contents</p> -<ul class="simple"> -<li><a class="reference internal" href="#models" id="id1">Models</a><ul> -<li><a class="reference internal" href="#what-is-a-model" id="id2">What is a Model?</a></li> -<li><a class="reference internal" href="#anatomy-of-a-model" id="id3">Anatomy of a Model</a></li> -<li><a class="reference internal" href="#loading-a-model" id="id4">Loading a Model</a></li> -<li><a class="reference internal" href="#auto-loading-models" id="id5">Auto-loading Models</a></li> -<li><a class="reference internal" href="#connecting-to-your-database" id="id6">Connecting to your Database</a></li> -</ul> -</li> -</ul> -</div> -<div class="section" id="what-is-a-model"> -<h2><a class="toc-backref" href="#id2">What is a Model?</a><a class="headerlink" href="#what-is-a-model" title="Permalink to this headline">¶</a></h2> -<p>Models are PHP classes that are designed to work with information in -your database. For example, let’s say you use CodeIgniter to manage a -blog. You might have a model class that contains functions to insert, -update, and retrieve your blog data. Here is an example of what such a -model class might look like:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">Blog_model</span> <span class="k">extends</span> <span class="nx">CI_Model</span> <span class="p">{</span> - - <span class="k">public</span> <span class="nv">$title</span><span class="p">;</span> - <span class="k">public</span> <span class="nv">$content</span><span class="p">;</span> - <span class="k">public</span> <span class="nv">$date</span><span class="p">;</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">get_last_ten_entries</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'entries'</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span> - <span class="k">return</span> <span class="nv">$query</span><span class="o">-></span><span class="na">result</span><span class="p">();</span> - <span class="p">}</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">insert_entry</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">title</span> <span class="o">=</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">'title'</span><span class="p">];</span> <span class="c1">// please read the below note</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">content</span> <span class="o">=</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">'content'</span><span class="p">];</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">date</span> <span class="o">=</span> <span class="nb">time</span><span class="p">();</span> - - <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'entries'</span><span class="p">,</span> <span class="nv">$this</span><span class="p">);</span> - <span class="p">}</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">update_entry</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">title</span> <span class="o">=</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">'title'</span><span class="p">];</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">content</span> <span class="o">=</span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">'content'</span><span class="p">];</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">date</span> <span class="o">=</span> <span class="nb">time</span><span class="p">();</span> - - <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update</span><span class="p">(</span><span class="s1">'entries'</span><span class="p">,</span> <span class="nv">$this</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">'id'</span> <span class="o">=></span> <span class="nv">$_POST</span><span class="p">[</span><span class="s1">'id'</span><span class="p">]));</span> - <span class="p">}</span> - -<span class="p">}</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">The methods in the above example use the <a class="reference internal" href="../database/query_builder.html"><em>Query Builder</em></a> database methods.</p> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">For the sake of simplicity in this example we’re using <tt class="docutils literal"><span class="pre">$_POST</span></tt> -directly. This is generally bad practice, and a more common approach -would be to use the <a class="reference internal" href="../libraries/input.html"><em>Input Library</em></a> -<tt class="docutils literal"><span class="pre">$this->input->post('title')</span></tt>.</p> -</div> -</div> -<div class="section" id="anatomy-of-a-model"> -<h2><a class="toc-backref" href="#id3">Anatomy of a Model</a><a class="headerlink" href="#anatomy-of-a-model" title="Permalink to this headline">¶</a></h2> -<p>Model classes are stored in your <strong>application/models/</strong> directory. -They can be nested within sub-directories if you want this type of -organization.</p> -<p>The basic prototype for a model class is this:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">Model_name</span> <span class="k">extends</span> <span class="nx">CI_Model</span> <span class="p">{</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span> - <span class="p">{</span> - <span class="k">parent</span><span class="o">::</span><span class="na">__construct</span><span class="p">();</span> - <span class="c1">// Your own constructor code</span> - <span class="p">}</span> - -<span class="p">}</span> -</pre></div> -</div> -<p>Where <strong>Model_name</strong> is the name of your class. Class names <strong>must</strong> have -the first letter capitalized with the rest of the name lowercase. Make -sure your class extends the base Model class.</p> -<p>The file name must match the class name. For example, if this is your class:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">User_model</span> <span class="k">extends</span> <span class="nx">CI_Model</span> <span class="p">{</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span> - <span class="p">{</span> - <span class="k">parent</span><span class="o">::</span><span class="na">__construct</span><span class="p">();</span> - <span class="c1">// Your own constructor code</span> - <span class="p">}</span> - -<span class="p">}</span> -</pre></div> -</div> -<p>Your file will be this:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">application</span><span class="o">/</span><span class="nx">models</span><span class="o">/</span><span class="nx">User_model</span><span class="o">.</span><span class="nx">php</span> -</pre></div> -</div> -</div> -<div class="section" id="loading-a-model"> -<h2><a class="toc-backref" href="#id4">Loading a Model</a><a class="headerlink" href="#loading-a-model" title="Permalink to this headline">¶</a></h2> -<p>Your models will typically be loaded and called from within your -<a class="reference internal" href="controllers.html"><em>controller</em></a> methods. To load a model you will use -the following method:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">);</span> -</pre></div> -</div> -<p>If your model is located in a sub-directory, include the relative path -from your models directory. For example, if you have a model located at -<em>application/models/blog/Queries.php</em> you’ll load it using:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'blog/queries'</span><span class="p">);</span> -</pre></div> -</div> -<p>Once loaded, you will access your model methods using an object with the -same name as your class:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">);</span> - -<span class="nv">$this</span><span class="o">-></span><span class="na">model_name</span><span class="o">-></span><span class="na">method</span><span class="p">();</span> -</pre></div> -</div> -<p>If you would like your model assigned to a different object name you can -specify it via the second parameter of the loading method:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">,</span> <span class="s1">'foobar'</span><span class="p">);</span> - -<span class="nv">$this</span><span class="o">-></span><span class="na">foobar</span><span class="o">-></span><span class="na">method</span><span class="p">();</span> -</pre></div> -</div> -<p>Here is an example of a controller, that loads a model, then serves a -view:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">Blog_controller</span> <span class="k">extends</span> <span class="nx">CI_Controller</span> <span class="p">{</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">blog</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'blog'</span><span class="p">);</span> - - <span class="nv">$data</span><span class="p">[</span><span class="s1">'query'</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">blog</span><span class="o">-></span><span class="na">get_last_ten_entries</span><span class="p">();</span> - - <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'blog'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> - <span class="p">}</span> -<span class="p">}</span> -</pre></div> -</div> -</div> -<div class="section" id="auto-loading-models"> -<h2><a class="toc-backref" href="#id5">Auto-loading Models</a><a class="headerlink" href="#auto-loading-models" title="Permalink to this headline">¶</a></h2> -<p>If you find that you need a particular model globally throughout your -application, you can tell CodeIgniter to auto-load it during system -initialization. This is done by opening the -<strong>application/config/autoload.php</strong> file and adding the model to the -autoload array.</p> -</div> -<div class="section" id="connecting-to-your-database"> -<h2><a class="toc-backref" href="#id6">Connecting to your Database</a><a class="headerlink" href="#connecting-to-your-database" title="Permalink to this headline">¶</a></h2> -<p>When a model is loaded it does <strong>NOT</strong> connect automatically to your -database. The following options for connecting are available to you:</p> -<ul> -<li><p class="first">You can connect using the standard database methods <a class="reference internal" href="../database/connecting.html"><em>described -here</em></a>, either from within your -Controller class or your Model class.</p> -</li> -<li><p class="first">You can tell the model loading method to auto-connect by passing -TRUE (boolean) via the third parameter, and connectivity settings, -as defined in your database config file will be used:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">,</span> <span class="s1">''</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> -</pre></div> -</div> -</li> -<li><p class="first">You can manually pass database connectivity settings via the third -parameter:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span><span class="p">[</span><span class="s1">'hostname'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'localhost'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'username'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'myusername'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'password'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mypassword'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'database'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mydatabase'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'dbdriver'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mysqli'</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'dbprefix'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">''</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'pconnect'</span><span class="p">]</span> <span class="o">=</span> <span class="k">FALSE</span><span class="p">;</span> -<span class="nv">$config</span><span class="p">[</span><span class="s1">'db_debug'</span><span class="p">]</span> <span class="o">=</span> <span class="k">TRUE</span><span class="p">;</span> - -<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">,</span> <span class="s1">''</span><span class="p">,</span> <span class="nv">$config</span><span class="p">);</span> -</pre></div> -</div> -</li> -</ul> -</div> -</div> - - - </div> - <footer> - - <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> - - <a href="helpers.html" class="btn btn-neutral float-right" title="Helper Functions">Next <span class="fa fa-arrow-circle-right"></span></a> - - - <a href="views.html" class="btn btn-neutral" title="Views"><span class="fa fa-arrow-circle-left"></span> Previous</a> - - </div> - - - <hr/> - - <div role="contentinfo"> - <p> - © Copyright 2014 - 2017, British Columbia Institute of Technology. - Last updated on Jun 19, 2017. - </p> - </div> - - Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. - -</footer> - </div> - </div> - - </section> - - </div> - - - - - - <script type="text/javascript"> - var DOCUMENTATION_OPTIONS = { - URL_ROOT:'../', - VERSION:'3.1.5', - COLLAPSE_INDEX:false, - FILE_SUFFIX:'.html', - HAS_SOURCE: false - }; - </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> - - - - - - <script type="text/javascript" src="../_static/js/theme.js"></script> - - - - - <script type="text/javascript"> - jQuery(function () { - SphinxRtdTheme.StickyNav.enable(); - }); - </script> - - -</body> -</html>
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