[eluser]Colin Williams[/eluser]
Here's a very basic example of MVC interaction that I posted for doug ealier:
Here's the run down. The Blog Controller is called because the user enters our blog URL. We load the blog model to handle retrieving our data. We use the model to retrieve the data and pass it into the view. Our view loops through the result from the model and displays it in a manner we want.
Excuse the brevity and shit HTML
Also, if this is all our Blog controller did, ever, a model might be slight overkill (a framework might even be overkill for this!). But it is highly likely your App and its interaction with your database will be much more complex.
Controller in
controllers/blog.php
Code:
class Blog extends Controller {
function Blog()
{
parent::Controller();
// Load the model and assign to $this->blog
$this->load->model('Blog_model', 'blog');
}
function index()
{
// Get 5 blog posts from our model
$data['posts'] = $this->blog->get_latest(5);
// Pass result to view for display
$this->load->view('blog/front', $data);
}
}
Model in
models/blog_model.php
Code:
class Blog_model extends Model {
function Blog_model()
{
parent::Model();
}
function get_latest($limit = 1)
{
$result = array(); // We should always return an array so our views don't choke in a foreach loop
// Prepare the query
$this->db->limit($limit);
$this->db->orderby('created', 'desc'); // Get most recent first
// Run the query and update $result if a result is found
$query = $this->db->get('blog');
if ($query->num_rows() > 0)
{
$result = $query->result();
}
return $result;
}
}
View in
views/blog/front.php
Code:
<html>
<head>
<title>My Blog Posts</title>
</head>
<body>
<? if (count($posts)) : ?>
<? foreach ($posts as $post) : ?>
<h2><?= $post->title ?></h2>
<?= $post->body ?>
<? endforeach; ?>
<? else: ?>
<p>No blog posts yet!</p>
<? endif; ?>
</body>
</html>
