关联CakePHP中的对象

Question

I have Users and I have Courses. I am trying to create a "Join" button for the users when they're viewing the course list in order to subscribe them to the Courses.

I was told to use

class Course extends AppModel
{
  public $hasAndBelongsToMany = array('User');
}

and

class User extends AppModel
{
  public $hasAndBelongsToMany = array('Course');
}

But I don't know how to implement the actual button and the posting of the info to a table called courses_users

Where do I implement this?

Thanks in advance!

Answer 1

You want to sent the student ID and the course ID to your saveAll() method. You could do this through your courses controller as follows:

<?php
class CoursesController extends AppController {

    public function join($courseId) {
        $data = array(
            'Course' => array(
                'id' => $courseId
            ),
            'Student' => array(
                'id' => $this->Auth->user('id') // ID of logged in user
            )
        );

        if ($this->Course->saveAll($data)) {
            $this->Session->setFlash( __('Successfully joined course.'));
        }
        else {
            $this->Session->setFlash( __('Error joining course.'));
        }

        $this->redirect('/');
    }
}

This is just a simple example. You’ll need to tweak it to your app, and add any validation etc.