Doing left join/inner join in many-to-many relations with Eloquent In Laravel 4

Question

Is there any way to do inner join using Eloquent in Laravel 4? Because I don't wanna show Courses without users in it.

Actually I have this.

Controller:

$courses = Course::all();
foreach($courses as $course){
  $course->users;
}

View:

@foreach($courses as $course)
    <h3>{{ $course->course}} :</h3>
    @foreach($course->users as $user)
        <p> {{$user->username}} </p>
    @endforeach
@endforeach

Class User:

public function courses(){
  return $this->belongsToMany('Course','course_user','id_usuario');
}

Class Course:

public function users(){
  return $this->belongsToMany('User','course_user','course_id','id_usuario');
}

Answer 1

I figured out that the method Has(); appears to be like inner join So in the controller i do:

$courses = Course::has('users')->get();

..and that's it :)

Link: http://laravel.com/docs/eloquent#querying-relations

Answer 2

Something like this should do, fill in your inner join.

return $this->belongsToMany('Course','course_user','id_usuario')
             ->join('students', 'student_user.user_id', '=', 'students.id')
             ->get();

Check out the documentation http://laravel.com/docs/queries#joins for more info!