diff options
Diffstat (limited to 'user_guide_src/source/tutorial')
| -rw-r--r-- | user_guide_src/source/tutorial/news_section.rst | 174 |
1 files changed, 87 insertions, 87 deletions
diff --git a/user_guide_src/source/tutorial/news_section.rst b/user_guide_src/source/tutorial/news_section.rst index 82b3e3b38..b64ea2aae 100644 --- a/user_guide_src/source/tutorial/news_section.rst +++ b/user_guide_src/source/tutorial/news_section.rst @@ -22,19 +22,19 @@ your database properly as described :: - <?php - class News_model extends CI_Model { + <?php + class News_model extends CI_Model { - public function __construct() - { - $this->load->database(); - } - } + public function __construct() + { + $this->load->database(); + } + } This code looks similar to the controller code that was used earlier. It -creates a new model by extending CI\_Model and loads the database +creates a new model by extending ``CI_Model`` and loads the database library. This will make the database class available through the -$this->db object. +``$this->db`` object. Before querying the database, a database schema has to be created. Connect to your database and run the SQL command below. Also add some @@ -42,14 +42,14 @@ seed records. :: - CREATE TABLE news ( - id int(11) NOT NULL AUTO_INCREMENT, - title varchar(128) NOT NULL, - slug varchar(128) NOT NULL, - text text NOT NULL, - PRIMARY KEY (id), - KEY slug (slug) - ); + CREATE TABLE news ( + id int(11) NOT NULL AUTO_INCREMENT, + title varchar(128) NOT NULL, + slug varchar(128) NOT NULL, + text text NOT NULL, + PRIMARY KEY (id), + KEY slug (slug) + ); Now that the database and a model have been set up, you'll need a method to get all of our posts from our database. To do this, the database @@ -61,22 +61,22 @@ following code to your model. :: - public function get_news($slug = FALSE) - { - if ($slug === FALSE) - { - $query = $this->db->get('news'); - return $query->result_array(); - } + public function get_news($slug = FALSE) + { + if ($slug === FALSE) + { + $query = $this->db->get('news'); + return $query->result_array(); + } - $query = $this->db->get_where('news', array('slug' => $slug)); - return $query->row_array(); - } + $query = $this->db->get_where('news', array('slug' => $slug)); + return $query->row_array(); + } With this code you can perform two different queries. You can get all news records, or get a news item by its `slug <#>`_. You might have noticed that the $slug variable wasn't sanitized before running the -query; Query Builder does this for you. +query; :doc:`Query Builder <../database/query_builder>` does this for you. Display the news ---------------- @@ -89,30 +89,30 @@ application/controllers/news.php. :: - <?php - class News extends CI_Controller { + <?php + class News extends CI_Controller { - public function __construct() - { - parent::__construct(); - $this->load->model('news_model'); - } + public function __construct() + { + parent::__construct(); + $this->load->model('news_model'); + } - public function index() - { - $data['news'] = $this->news_model->get_news(); - } + public function index() + { + $data['news'] = $this->news_model->get_news(); + } - public function view($slug) - { - $data['news'] = $this->news_model->get_news($slug); - } - } + public function view($slug = NULL) + { + $data['news_item'] = $this->news_model->get_news($slug); + } + } Looking at the code, you may see some similarity with the files we -created earlier. First, the "\_\_construct" method: it calls the -constructor of its parent class (CI\_Controller) and loads the model, so -it can be used in all other methods in this controller. +created earlier. First, the ``__construct()`` method: it calls the +constructor of its parent class (``CI_Controller``) and loads the model, +so it can be used in all other methods in this controller. Next, there are two methods to view all news items and one for a specific news item. You can see that the $slug variable is passed to the @@ -125,15 +125,15 @@ the views. :: - public function index() - { - $data['news'] = $this->news_model->get_news(); - $data['title'] = 'News archive'; + public function index() + { + data['news'] = $this->news_model->get_news(); + $data['title'] = 'News archive'; - $this->load->view('templates/header', $data); - $this->load->view('news/index', $data); - $this->load->view('templates/footer'); - } + $this->load->view('templates/header', $data); + $this->load->view('news/index', $data); + $this->load->view('templates/footer'); + } 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 $data['title'] @@ -143,20 +143,20 @@ and add the next piece of code. :: - <?php foreach ($news as $news_item): ?> + <?php foreach ($news as $news_item): ?> - <h2><?php echo $news_item['title'] ?></h2> - <div id="main"> - <?php echo $news_item['text'] ?> - </div> - <p><a href="<?php echo $news_item['slug'] ?>">View article</a></p> + <h2><?php echo $news_item['title'] ?></h2> + <div id="main"> + <?php echo $news_item['text'] ?> + </div> + <p><a href="<?php echo $news_item['slug'] ?>">View article</a></p> - <?php endforeach ?> + <?php endforeach ?> Here, each news item is looped and displayed to the user. You can see we wrote our template in PHP mixed with HTML. If you prefer to use a template language, you can use CodeIgniter's `Template -Parser <../libraries/parser.html>`_ class or a third party parser. +Parser <../libraries/parser>`_ class or a third party parser. The news overview page is now done, but a page to display individual news items is still absent. The model created earlier is made in such @@ -166,32 +166,32 @@ news controller and add the following lines to the file. :: - public function view($slug) - { - $data['news_item'] = $this->news_model->get_news($slug); + public function view($slug = NULL) + { + $data['news_item'] = $this->news_model->get_news($slug); - if (empty($data['news_item'])) - { - show_404(); - } + if (empty($data['news_item'])) + { + show_404(); + } - $data['title'] = $data['news_item']['title']; + $data['title'] = $data['news_item']['title']; - $this->load->view('templates/header', $data); - $this->load->view('news/view', $data); - $this->load->view('templates/footer'); - } + $this->load->view('templates/header', $data); + $this->load->view('news/view', $data); + $this->load->view('templates/footer'); + } -Instead of calling the get\_news() method without a parameter, the $slug -variable is passed, so it will return the specific news item. The only -things left to do is create the corresponding view at -application/views/news/view.php. Put the following code in this file. +Instead of calling the ``get_news()`` method without a parameter, the +``$slug`` variable is passed, so it will return the specific news item. +The only things left to do is create the corresponding view at +*application/views/news/view.php*. Put the following code in this file. :: - <?php - echo '<h2>'.$news_item['title'].'</h2>'; - echo $news_item['text']; + <?php + echo '<h2>'.$news_item['title'].'</h2>'; + echo $news_item['text']; Routing ------- @@ -205,10 +205,10 @@ a slug to the view method in the news controller. :: - $route['news/(:any)'] = 'news/view/$1'; - $route['news'] = 'news'; - $route['(:any)'] = 'pages/view/$1'; - $route['default_controller'] = 'pages/view'; + $route['news/(:any)'] = 'news/view/$1'; + $route['news'] = 'news'; + $route['(:any)'] = 'pages/view/$1'; + $route['default_controller'] = 'pages/view'; Point your browser to your document root, followed by index.php/news and -watch your news page. +watch your news page.
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