使用模型的Laravel刀片关系

Question

I have a relationship between these 3 models

class Teach extends Model {

public function departments() {
    return $this->belongsToMany('App\Department', 'teach', 'id', 'department_id');
}

public function subjects() {
    return $this->belongsToMany('App\Subject', 'teach', 'id', 'subject_id');
}

public function teachers() {
    return $this->belongsToMany('App\Teacher', 'teach', 'id', 'teacher_id');
} 
}

I want to list all departments and subjects of a specific teacher using these relation I've tried this in my view but it doesn't work $teacher->teach->departments;

Answer 1

This is the Many to Many relationship between teacher and departments

class Teacher extends Model {

  public function departments() {
    return $this->belongsToMany('App\Department', 'teach', 'teacher_id', 'department_id');
  }

}


class Department extends Model {

  public function teachers() {
    return $this->belongsToMany('App\Teacher', 'teach', 'department_id', 'teacher_id');
  }

}

Now fetch data

$teacher = Teacher::with('departments')->find(1);
$departments = $teacher->departments;