CakePHP - 列出按program_id分组的条目

Question

I have the following relations between my models

Program hasMany Classroom
Classroom belongsTo Program

What I am trying to achieve is to display all the classrooms, grouped by program, for example:

Program 1

-Classroom 1

-Classroom 2

-Classroom 3

Program 2

-Classroom 1

-Classroom 2... etc

My index action in ClassroomsController:

    function index() {

    $this->Access->grantAdmin();

    $this->Classroom->recursive = 1;
    $this->set('classrooms', $this->paginate());
}

I tried to use this:

    var $paginate = array(
    'group' => 'program_id'
);

But it didn't work as I expected. Any ideas? Thanks

Answer 1

Try adding:

var $actsAs = array('Containable');

to the Program model. Then in the controller:

$programs = $this->Classroom->Program->find('all', array(
    'contain' => array(
        'Classroom',
    ),
));
$this->set(compact('programs'));

This should return your data in the hierarchy you're looking for. See the Containable behaviour documentation for more details. Note that you don't need the $this->Classroom->recursive statement if you use Containable.

Your own code example shows that you're using pagination. It should be fairly easy to put containable and pagination together by looking around the docs.