Accessing data in a many to many and one to many relations - php

Question

I dont know howto accessing data from a related table (with ActiveRecords) and use all those records as a dataSource for a CActiveDataProvider. The main idea is that a user must be able toCRUD` only the courses from his classes.
I have the following tables:
user (id, name, age, email...),
user_class (user_id, class_id),
class (id, name, description, ...),
course (id, class_id, name, description);
User and Class tables have a MANY TO MANY and Class and Course tables have a ONE TO MANY relation
I also defined the following relations:
User model relations:
'classes'=>array(
self::MANY_MANY,
'Class',
'user_class(user_id, class_id)',
),
'courses'=>array(
self::HAS_MANY,
'Course',
array('class_id','id'),
'through'=>'classes'
)
Class model relations:
'users' => array(
self::MANY_MANY,
'User',
'user_class(class_id, user_id)'
),
'courses' => array(
self::HAS_MANY,
'Class',
'class_id'
),
Course model relations:
'class' => array(
self::BELONGS_TO,
'Class',
'class_id'
)
In my CourseController , on actionManage() I have something like this:
public function actionManage() {
$currentUser = User::model()->with('classes', 'courses')->findByPk(Yii::app()->user->id);
$userCourses = $currentUser->classes->courses; //--> NO courses!!!
/* add users` courses to an CActiveDataProvider //--> how to do this?!
}

Answer 1

If you try to var_dump($currentUser->classes); you'll notice that it's an array.
$userCourses = $currentUser->classes[0]->courses; will work if there are classes associated with $currentUser
Since you're loading many things lazily (each "class" loads its' "courses" the first time they're requested) this could become slow down the road, but for now, run with it I guess.