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Diffstat (limited to 'user_guide_src/source/general/models.rst')
| -rw-r--r-- | user_guide_src/source/general/models.rst | 95 |
1 files changed, 83 insertions, 12 deletions
diff --git a/user_guide_src/source/general/models.rst b/user_guide_src/source/general/models.rst index e26207cc2..55081d12a 100644 --- a/user_guide_src/source/general/models.rst +++ b/user_guide_src/source/general/models.rst @@ -20,10 +20,46 @@ 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:: - class Blogmodel extends CI_Model { var $title = ''; var $content = ''; var $date = ''; function __construct() { // Call the Model constructor parent::__construct(); } function get_last_ten_entries() { $query = $this->db->get('entries', 10); return $query->result(); } function insert_entry() { $this->title = $_POST['title']; // please read the below note $this->content = $_POST['content']; $this->date = time(); $this->db->insert('entries', $this); } function update_entry() { $this->title = $_POST['title']; $this->content = $_POST['content']; $this->date = time(); $this->db->update('entries', $this, array('id' => $_POST['id'])); } } + class Blogmodel extends CI_Model { -Note: The functions in the above example use the :doc:`Active -Record <../database/active_record>` database functions. + var $title = ''; + var $content = ''; + var $date = ''; + + function __construct() + { + // Call the Model constructor + parent::__construct(); + } + + function get_last_ten_entries() + { + $query = $this->db->get('entries', 10); + return $query->result(); + } + + function insert_entry() + { + $this->title = $_POST['title']; // please read the below note + $this->content = $_POST['content']; + $this->date = time(); + + $this->db->insert('entries', $this); + } + + function update_entry() + { + $this->title = $_POST['title']; + $this->content = $_POST['content']; + $this->date = time(); + + $this->db->update('entries', $this, array('id' => $_POST['id'])); + } + + } + +.. note:: The functions in the above example use the :doc:`Active + Record <../database/active_record>` database functions. .. note:: For the sake of simplicity in this example we're using $_POST directly. This is generally bad practice, and a more common approach @@ -38,7 +74,13 @@ nested within sub-folders if you want this type of organization. The basic prototype for a model class is this:: - class Model_name extends CI_Model { function __construct() { parent::__construct(); } } + class Model_name extends CI_Model { + + function __construct() + { + parent::__construct(); + } + } Where Model_name is the name of your class. Class names **must** have the first letter capitalized with the rest of the name lowercase. Make @@ -47,7 +89,13 @@ sure your class extends the base Model class. The file name will be a lower case version of your class name. For example, if your class is this:: - class User_model extends CI_Model { function __construct() { parent::__construct(); } } + class User_model extends CI_Model { + + function __construct() + { + parent::__construct(); + } + } Your file will be this:: @@ -71,17 +119,32 @@ application/models/blog/queries.php you'll load it using:: Once loaded, you will access your model functions using an object with the same name as your class:: - $this->load->model('Model_name'); $this->Model_name->function(); + $this->load->model('Model_name'); + + $this->Model_name->function(); If you would like your model assigned to a different object name you can specify it via the second parameter of the loading function:: - $this->load->model('Model_name', 'fubar'); $this->fubar->function(); + $this->load->model('Model_name', 'fubar'); + + $this->fubar->function(); Here is an example of a controller, that loads a model, then serves a view:: - class Blog_controller extends CI_Controller { function blog() { $this->load->model('Blog'); $data['query'] = $this->Blog->get_last_ten_entries(); $this->load->view('blog', $data); } } + class Blog_controller extends CI_Controller { + + function blog() + { + $this->load->model('Blog'); + + $data['query'] = $this->Blog->get_last_ten_entries(); + + $this->load->view('blog', $data); + } + } + Auto-loading Models =================== @@ -109,9 +172,17 @@ database. The following options for connecting are available to you: $this->load->model('Model_name', '', TRUE); - You can manually pass database connectivity settings via the third - parameter: - :: - - $config['hostname'] = "localhost"; $config['username'] = "myusername"; $config['password'] = "mypassword"; $config['database'] = "mydatabase"; $config['dbdriver'] = "mysql"; $config['dbprefix'] = ""; $config['pconnect'] = FALSE; $config['db_debug'] = TRUE; $this->load->model('Model_name', '', $config); + parameter:: + + $config['hostname'] = "localhost"; + $config['username'] = "myusername"; + $config['password'] = "mypassword"; + $config['database'] = "mydatabase"; + $config['dbdriver'] = "mysql"; + $config['dbprefix'] = ""; + $config['pconnect'] = FALSE; + $config['db_debug'] = TRUE; + + $this->load->model('Model_name', '', $config); |