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diff --git a/user_guide/tutorial/create_news_items.html b/user_guide/tutorial/create_news_items.html new file mode 100644 index 000000000..9971d87a5 --- /dev/null +++ b/user_guide/tutorial/create_news_items.html @@ -0,0 +1,629 @@ + + +<!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>Create news items — CodeIgniter 3.1.11 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 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class="reference internal" href="../helpers/index.html">Helpers</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li> +<li class="toctree-l2"><a class="reference internal" 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>Create news items</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="create-news-items"> +<h1>Create news items<a class="headerlink" href="#create-news-items" title="Permalink to this headline">¶</a></h1> +<p>You now know how you can read data from a database using CodeIgniter, but +you haven’t written any information to the database yet. In this section +you’ll expand your news controller and model created earlier to include +this functionality.</p> +<div class="section" id="create-a-form"> +<h2>Create a form<a class="headerlink" href="#create-a-form" title="Permalink to this headline">¶</a></h2> +<p>To input data into the database you need to create a form where you can +input the information to be stored. This means you’ll be needing a form +with two fields, one for the title and one for the text. You’ll derive +the slug from our title in the model. Create the new view at +<em>application/views/news/create.php</em>.</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">echo</span> <span class="nx">validation_errors</span><span class="p">();</span> <span class="cp">?></span> + +<span class="cp"><?php</span> <span class="k">echo</span> <span class="nx">form_open</span><span class="p">(</span><span class="s1">'news/create'</span><span class="p">);</span> <span class="cp">?></span> + + <span class="p"><</span><span class="nt">label</span> <span class="na">for</span><span class="o">=</span><span class="s">"title"</span><span class="p">></span>Title<span class="p"></</span><span class="nt">label</span><span class="p">></span> + <span class="p"><</span><span class="nt">input</span> <span class="na">type</span><span class="o">=</span><span class="s">"text"</span> <span class="na">name</span><span class="o">=</span><span class="s">"title"</span> <span class="p">/><</span><span class="nt">br</span> <span class="p">/></span> + + <span class="p"><</span><span class="nt">label</span> <span class="na">for</span><span class="o">=</span><span class="s">"text"</span><span class="p">></span>Text<span class="p"></</span><span class="nt">label</span><span class="p">></span> + <span class="p"><</span><span class="nt">textarea</span> <span class="na">name</span><span class="o">=</span><span class="s">"text"</span><span class="p">></</span><span class="nt">textarea</span><span class="p">><</span><span class="nt">br</span> <span class="p">/></span> + + <span class="p"><</span><span class="nt">input</span> <span class="na">type</span><span class="o">=</span><span class="s">"submit"</span> <span class="na">name</span><span class="o">=</span><span class="s">"submit"</span> <span class="na">value</span><span class="o">=</span><span class="s">"Create news item"</span> <span class="p">/></span> + +<span class="p"></</span><span class="nt">form</span><span class="p">></span> +</pre></div> +</div> +<p>There are only two things here that probably look unfamiliar to you: the +<code class="docutils literal"><span class="pre">form_open()</span></code> function and the <code class="docutils literal"><span class="pre">validation_errors()</span></code> function.</p> +<p>The first function is provided by the <a class="reference internal" href="../helpers/form_helper.html"><span class="doc">form +helper</span></a> and renders the form element and +adds extra functionality, like adding a hidden <a class="reference internal" href="../libraries/security.html"><span class="doc">CSRF prevention +field</span></a>. The latter is used to report +errors related to form validation.</p> +<p>Go back to your news controller. You’re going to do two things here, +check whether the form was submitted and whether the submitted data +passed the validation rules. You’ll use the <a class="reference internal" href="../libraries/form_validation.html"><span class="doc">form +validation</span></a> library to do this.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">create</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">helper</span><span class="p">(</span><span class="s1">'form'</span><span class="p">);</span> + <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'form_validation'</span><span class="p">);</span> + + <span class="nv">$data</span><span class="p">[</span><span class="s1">'title'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'Create a news item'</span><span class="p">;</span> + + <span class="nv">$this</span><span class="o">-></span><span class="na">form_validation</span><span class="o">-></span><span class="na">set_rules</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span> <span class="s1">'Title'</span><span class="p">,</span> <span class="s1">'required'</span><span class="p">);</span> + <span class="nv">$this</span><span class="o">-></span><span class="na">form_validation</span><span class="o">-></span><span class="na">set_rules</span><span class="p">(</span><span class="s1">'text'</span><span class="p">,</span> <span class="s1">'Text'</span><span class="p">,</span> <span class="s1">'required'</span><span class="p">);</span> + + <span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">form_validation</span><span class="o">-></span><span class="na">run</span><span class="p">()</span> <span class="o">===</span> <span class="k">FALSE</span><span class="p">)</span> + <span class="p">{</span> + <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">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/create'</span><span class="p">);</span> + <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'templates/footer'</span><span class="p">);</span> + + <span class="p">}</span> + <span class="k">else</span> + <span class="p">{</span> + <span class="nv">$this</span><span class="o">-></span><span class="na">news_model</span><span class="o">-></span><span class="na">set_news</span><span class="p">();</span> + <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'news/success'</span><span class="p">);</span> + <span class="p">}</span> +<span class="p">}</span> +</pre></div> +</div> +<p>The code above adds a lot of functionality. The first few lines load the +form helper and the form validation library. After that, rules for the +form validation are set. The <code class="docutils literal"><span class="pre">set_rules()</span></code> method takes three arguments; +the name of the input field, the name to be used in error messages, and +the rule. In this case the title and text fields are required.</p> +<p>CodeIgniter has a powerful form validation library as demonstrated +above. You can read <a class="reference internal" href="../libraries/form_validation.html"><span class="doc">more about this library +here</span></a>.</p> +<p>Continuing down, you can see a condition that checks whether the form +validation ran successfully. If it did not, the form is displayed, if it +was submitted <strong>and</strong> passed all the rules, the model is called. After +this, a view is loaded to display a success message. Create a view at +<em>application/views/news/success.php</em> and write a success message.</p> +</div> +<div class="section" id="model"> +<h2>Model<a class="headerlink" href="#model" title="Permalink to this headline">¶</a></h2> +<p>The only thing that remains is writing a method that writes the data to +the database. You’ll use the Query Builder class to insert the +information and use the input library to get the posted data. Open up +the model created earlier and add the following:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">set_news</span><span class="p">()</span> +<span class="p">{</span> + <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'url'</span><span class="p">);</span> + + <span class="nv">$slug</span> <span class="o">=</span> <span class="nx">url_title</span><span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">input</span><span class="o">-></span><span class="na">post</span><span class="p">(</span><span class="s1">'title'</span><span class="p">),</span> <span class="s1">'dash'</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> + + <span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> + <span class="s1">'title'</span> <span class="o">=></span> <span class="nv">$this</span><span class="o">-></span><span class="na">input</span><span class="o">-></span><span class="na">post</span><span class="p">(</span><span class="s1">'title'</span><span class="p">),</span> + <span class="s1">'slug'</span> <span class="o">=></span> <span class="nv">$slug</span><span class="p">,</span> + <span class="s1">'text'</span> <span class="o">=></span> <span class="nv">$this</span><span class="o">-></span><span class="na">input</span><span class="o">-></span><span class="na">post</span><span class="p">(</span><span class="s1">'text'</span><span class="p">)</span> + <span class="p">);</span> + + <span class="k">return</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'news'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> +<span class="p">}</span> +</pre></div> +</div> +<p>This new method takes care of inserting the news item into the database. +The third line contains a new function, url_title(). This function - +provided by the <a class="reference internal" href="../helpers/url_helper.html"><span class="doc">URL helper</span></a> - strips down +the string you pass it, replacing all spaces by dashes (-) and makes +sure everything is in lowercase characters. This leaves you with a nice +slug, perfect for creating URIs.</p> +<p>Let’s continue with preparing the record that is going to be inserted +later, inside the <code class="docutils literal"><span class="pre">$data</span></code> array. Each element corresponds with a column in +the database table created earlier. You might notice a new method here, +namely the <code class="docutils literal"><span class="pre">post()</span></code> method from the <a class="reference internal" href="../libraries/input.html"><span class="doc">input +library</span></a>. This method makes sure the data is +sanitized, protecting you from nasty attacks from others. The input +library is loaded by default. At last, you insert our <code class="docutils literal"><span class="pre">$data</span></code> array into +our database.</p> +</div> +<div class="section" id="routing"> +<h2>Routing<a class="headerlink" href="#routing" title="Permalink to this headline">¶</a></h2> +<p>Before you can start adding news items into your CodeIgniter application +you have to add an extra rule to <em>config/routes.php</em> file. Make sure your +file contains the following. This makes sure CodeIgniter sees ‘create’ +as a method instead of a news item’s slug.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$route</span><span class="p">[</span><span class="s1">'news/create'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'news/create'</span><span class="p">;</span> +<span class="nv">$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>Now point your browser to your local development environment where you +installed CodeIgniter and add index.php/news/create to the URL. +Congratulations, you just created your first CodeIgniter application! +Add some news and check out the different pages you made.</p> +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="conclusion.html" class="btn btn-neutral float-right" title="Conclusion">Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="news_section.html" class="btn btn-neutral" title="News section"><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 Sep 19, 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:'3.1.11', + 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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