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diff --git a/user_guide/tutorial/news_section.html b/user_guide/tutorial/news_section.html deleted file mode 100644 index 454a5bac6..000000000 --- a/user_guide/tutorial/news_section.html +++ /dev/null @@ -1,685 +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>News section — CodeIgniter 3.1.10 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="index" title="Index" - href="../genindex.html"/> - <link rel="search" 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href="../helpers/string_helper.html">String Helper</a></li> -<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li> -<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li> -<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li> -<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> -</ul> -</li> -</ul> - - - - </div> - - </nav> - - <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> - - - <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> - <i data-toggle="wy-nav-top" class="fa fa-bars"></i> - <a href="../index.html">CodeIgniter</a> - </nav> - - - - <div class="wy-nav-content"> - <div class="rst-content"> - <div role="navigation" aria-label="breadcrumbs navigation"> - <ul class="wy-breadcrumbs"> - <li><a href="../index.html">Docs</a> »</li> - - <li><a href="index.html">Tutorial</a> »</li> - - <li>News section</li> - <li class="wy-breadcrumbs-aside"> - - </li> - <div style="float:right;margin-left:5px;" id="closeMe"> - <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> - </div> - </ul> - <hr/> -</div> - <div role="main" class="document"> - - <div class="section" id="news-section"> -<h1>News section<a class="headerlink" href="#news-section" title="Permalink to this headline">¶</a></h1> -<p>In the last section, we went over some basic concepts of the framework -by writing a class that includes static pages. We cleaned up the URI by -adding custom routing rules. Now it’s time to introduce dynamic content -and start using a database.</p> -<div class="section" id="setting-up-your-model"> -<h2>Setting up your model<a class="headerlink" href="#setting-up-your-model" title="Permalink to this headline">¶</a></h2> -<p>Instead of writing database operations right in the controller, queries -should be placed in a model, so they can easily be reused later. Models -are the place where you retrieve, insert, and update information in your -database or other data stores. They represent your data.</p> -<p>Open up the <em>application/models/</em> directory and create a new file called -<em>News_model.php</em> and add the following code. Make sure you’ve configured -your database properly as described <a class="reference internal" href="../database/configuration.html"><span class="doc">here</span></a>.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> -<span class="k">class</span> <span class="nc">News_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="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">();</span> - <span class="p">}</span> -<span class="p">}</span> -</pre></div> -</div> -<p>This code looks similar to the controller code that was used earlier. It -creates a new model by extending <code class="docutils literal"><span class="pre">CI_Model</span></code> and loads the database -library. This will make the database class available through the -<code class="docutils literal"><span class="pre">$this->db</span></code> object.</p> -<p>Before querying the database, a database schema has to be created. -Connect to your database and run the SQL command below (MySQL). -Also add some seed records.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">CREATE</span> <span class="nx">TABLE</span> <span class="nx">news</span> <span class="p">(</span> - <span class="nx">id</span> <span class="nx">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span> <span class="nx">AUTO_INCREMENT</span><span class="p">,</span> - <span class="nx">title</span> <span class="nx">varchar</span><span class="p">(</span><span class="mi">128</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span> - <span class="nx">slug</span> <span class="nx">varchar</span><span class="p">(</span><span class="mi">128</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span> - <span class="nx">text</span> <span class="nx">text</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span> - <span class="nx">PRIMARY</span> <span class="nx">KEY</span> <span class="p">(</span><span class="nx">id</span><span class="p">),</span> - <span class="nx">KEY</span> <span class="nx">slug</span> <span class="p">(</span><span class="nx">slug</span><span class="p">)</span> -<span class="p">);</span> -</pre></div> -</div> -<p>Now that the database and a model have been set up, you’ll need a method -to get all of our posts from our database. To do this, the database -abstraction layer that is included with CodeIgniter — -<a class="reference internal" href="../database/query_builder.html"><span class="doc">Query Builder</span></a> — is used. This makes it -possible to write your ‘queries’ once and make them work on <a class="reference internal" href="../general/requirements.html"><span class="doc">all -supported database systems</span></a>. Add the -following code to your model.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">get_news</span><span class="p">(</span><span class="nv">$slug</span> <span class="o">=</span> <span class="k">FALSE</span><span class="p">)</span> -<span class="p">{</span> - <span class="k">if</span> <span class="p">(</span><span class="nv">$slug</span> <span class="o">===</span> <span class="k">FALSE</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">'news'</span><span class="p">);</span> - <span class="k">return</span> <span class="nv">$query</span><span class="o">-></span><span class="na">result_array</span><span class="p">();</span> - <span class="p">}</span> - - <span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get_where</span><span class="p">(</span><span class="s1">'news'</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">'slug'</span> <span class="o">=></span> <span class="nv">$slug</span><span class="p">));</span> - <span class="k">return</span> <span class="nv">$query</span><span class="o">-></span><span class="na">row_array</span><span class="p">();</span> -<span class="p">}</span> -</pre></div> -</div> -<p>With this code you can perform two different queries. You can get all -news records, or get a news item by its <a class="reference external" href="#">slug</a>. You might have -noticed that the <code class="docutils literal"><span class="pre">$slug</span></code> variable wasn’t sanitized before running the -query; <a class="reference internal" href="../database/query_builder.html"><span class="doc">Query Builder</span></a> does this for you.</p> -</div> -<div class="section" id="display-the-news"> -<h2>Display the news<a class="headerlink" href="#display-the-news" title="Permalink to this headline">¶</a></h2> -<p>Now that the queries are written, the model should be tied to the views -that are going to display the news items to the user. This could be done -in our <code class="docutils literal"><span class="pre">Pages</span></code> controller created earlier, but for the sake of clarity, -a new <code class="docutils literal"><span class="pre">News</span></code> controller is defined. Create the new controller at -<em>application/controllers/News.php</em>.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> -<span class="k">class</span> <span class="nc">News</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">__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="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'news_model'</span><span class="p">);</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'url_helper'</span><span class="p">);</span> - <span class="p">}</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">index</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$data</span><span class="p">[</span><span class="s1">'news'</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">news_model</span><span class="o">-></span><span class="na">get_news</span><span class="p">();</span> - <span class="p">}</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">view</span><span class="p">(</span><span class="nv">$slug</span> <span class="o">=</span> <span class="k">NULL</span><span class="p">)</span> - <span class="p">{</span> - <span class="nv">$data</span><span class="p">[</span><span class="s1">'news_item'</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">news_model</span><span class="o">-></span><span class="na">get_news</span><span class="p">(</span><span class="nv">$slug</span><span class="p">);</span> - <span class="p">}</span> -<span class="p">}</span> -</pre></div> -</div> -<p>Looking at the code, you may see some similarity with the files we -created earlier. First, the <code class="docutils literal"><span class="pre">__construct()</span></code> method: it calls the -constructor of its parent class (<code class="docutils literal"><span class="pre">CI_Controller</span></code>) and loads the model, -so it can be used in all other methods in this controller. -It also loads a collection of <a class="reference internal" href="../helpers/url_helper.html"><span class="doc">URL Helper</span></a> -functions, because we’ll use one of them in a view later.</p> -<p>Next, there are two methods to view all news items and one for a specific -news item. You can see that the <code class="docutils literal"><span class="pre">$slug</span></code> variable is passed to the model’s -method in the second method. The model is using this slug to identify the -news item to be returned.</p> -<p>Now the data is retrieved by the controller through our model, but -nothing is displayed yet. The next thing to do is passing this data to -the views.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">index</span><span class="p">()</span> -<span class="p">{</span> - <span class="nv">$data</span><span class="p">[</span><span class="s1">'news'</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">news_model</span><span class="o">-></span><span class="na">get_news</span><span class="p">();</span> - <span class="nv">$data</span><span class="p">[</span><span class="s1">'title'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'News archive'</span><span class="p">;</span> - - <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'templates/header'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'news/index'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'templates/footer'</span><span class="p">);</span> -<span class="p">}</span> -</pre></div> -</div> -<p>The code above gets all news records from the model and assigns it to a -variable. The value for the title is also assigned to the <code class="docutils literal"><span class="pre">$data['title']</span></code> -element and all data is passed to the views. You now need to create a -view to render the news items. Create <em>application/views/news/index.php</em> -and add the next piece of code.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">h2</span><span class="o">><?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nv">$title</span><span class="p">;</span> <span class="cp">?></span><span class="p"></</span><span class="nt">h2</span><span class="p">></span> - -<span class="cp"><?php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$news</span> <span class="k">as</span> <span class="nv">$news_item</span><span class="p">)</span><span class="o">:</span> <span class="cp">?></span> - - <span class="p"><</span><span class="nt">h3</span><span class="p">></span><span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$news_item</span><span class="p">[</span><span class="s1">'title'</span><span class="p">];</span> <span class="cp">?></span><span class="p"></</span><span class="nt">h3</span><span class="p">></span> - <span class="p"><</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">"main"</span><span class="p">></span> - <span class="cp"><?php</span> <span class="k">echo</span> <span class="nv">$news_item</span><span class="p">[</span><span class="s1">'text'</span><span class="p">];</span> <span class="cp">?></span> - <span class="p"></</span><span class="nt">div</span><span class="p">></span> - <span class="p"><</span><span class="nt">p</span><span class="p">><</span><span class="nt">a</span> <span class="na">href</span><span class="o">=</span><span class="s">"</span><span class="cp"><?php</span> <span class="k">echo</span> <span class="nx">site_url</span><span class="p">(</span><span class="s1">'news/'</span><span class="o">.</span><span class="nv">$news_item</span><span class="p">[</span><span class="s1">'slug'</span><span class="p">]);</span> <span class="cp">?></span><span class="s">"</span><span class="p">></span>View article<span class="p"></</span><span class="nt">a</span><span class="p">></</span><span class="nt">p</span><span class="p">></span> - -<span class="cp"><?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?></span> -</pre></div> -</div> -<p>Here, each news item is looped and displayed to the user. You can see we -wrote our template in PHP mixed with HTML. If you prefer to use a template -language, you can use CodeIgniter’s <a class="reference internal" href="../libraries/parser.html"><span class="doc">Template -Parser</span></a> class or a third party parser.</p> -<p>The news overview page is now done, but a page to display individual -news items is still absent. The model created earlier is made in such -way that it can easily be used for this functionality. You only need to -add some code to the controller and create a new view. Go back to the -<code class="docutils literal"><span class="pre">News</span></code> controller and update <code class="docutils literal"><span class="pre">view()</span></code> with the following:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">view</span><span class="p">(</span><span class="nv">$slug</span> <span class="o">=</span> <span class="k">NULL</span><span class="p">)</span> -<span class="p">{</span> - <span class="nv">$data</span><span class="p">[</span><span class="s1">'news_item'</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">news_model</span><span class="o">-></span><span class="na">get_news</span><span class="p">(</span><span class="nv">$slug</span><span class="p">);</span> - - <span class="k">if</span> <span class="p">(</span><span class="k">empty</span><span class="p">(</span><span class="nv">$data</span><span class="p">[</span><span class="s1">'news_item'</span><span class="p">]))</span> - <span class="p">{</span> - <span class="nx">show_404</span><span class="p">();</span> - <span class="p">}</span> - - <span class="nv">$data</span><span class="p">[</span><span class="s1">'title'</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$data</span><span class="p">[</span><span class="s1">'news_item'</span><span class="p">][</span><span class="s1">'title'</span><span class="p">];</span> - - <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'templates/header'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> - <span class="nv">$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">'news/view'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> - <span class="nv">$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">'templates/footer'</span><span class="p">);</span> -<span class="p">}</span> -</pre></div> -</div> -<p>Instead of calling the <code class="docutils literal"><span class="pre">get_news()</span></code> method without a parameter, the -<code class="docutils literal"><span class="pre">$slug</span></code> variable is passed, so it will return the specific news item. -The only things left to do is create the corresponding view at -<em>application/views/news/view.php</em>. Put the following code in this file.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> -<span class="k">echo</span> <span class="s1">'<h2>'</span><span class="o">.</span><span class="nv">$news_item</span><span class="p">[</span><span class="s1">'title'</span><span class="p">]</span><span class="o">.</span><span class="s1">'</h2>'</span><span class="p">;</span> -<span class="k">echo</span> <span class="nv">$news_item</span><span class="p">[</span><span class="s1">'text'</span><span class="p">];</span> -</pre></div> -</div> -</div> -<div class="section" id="routing"> -<h2>Routing<a class="headerlink" href="#routing" title="Permalink to this headline">¶</a></h2> -<p>Because of the wildcard routing rule created earlier, you need an extra -route to view the controller that you just made. Modify your routing file -(<em>application/config/routes.php</em>) so it looks as follows. -This makes sure the requests reaches the <code class="docutils literal"><span class="pre">News</span></code> controller instead of -going directly to the <code class="docutils literal"><span class="pre">Pages</span></code> controller. The first line routes URI’s -with a slug to the <code class="docutils literal"><span class="pre">view()</span></code> method in the <code class="docutils literal"><span class="pre">News</span></code> controller.</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$route</span><span class="p">[</span><span class="s1">'news/(:any)'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'news/view/$1'</span><span class="p">;</span> -<span class="nv">$route</span><span class="p">[</span><span class="s1">'news'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'news'</span><span class="p">;</span> -<span class="nv">$route</span><span class="p">[</span><span class="s1">'(:any)'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'pages/view/$1'</span><span class="p">;</span> -<span class="nv">$route</span><span class="p">[</span><span class="s1">'default_controller'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'pages/view'</span><span class="p">;</span> -</pre></div> -</div> -<p>Point your browser to your document root, followed by index.php/news and -watch your news page.</p> -</div> -</div> - - - </div> - <footer> - - <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> - - <a href="create_news_items.html" class="btn btn-neutral float-right" title="Create news items">Next <span class="fa fa-arrow-circle-right"></span></a> - - - <a href="static_pages.html" class="btn btn-neutral" title="Static pages"><span class="fa fa-arrow-circle-left"></span> Previous</a> - - </div> - - - <hr/> - - <div role="contentinfo"> - <p> - © Copyright 2014 - 2019, British Columbia Institute of Technology. - Last updated on Jan 16, 2019. - </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:'3.1.10', - 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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