// table name: coz_lessons_changes
{
 "_id": ObjectId("5fdd41cfc8c832ba57cdb3a6"),
 "lesson_id": ObjectId("5fd84e467f180d5db02be90f"),
 "to_status": "booking"
}

// table name: coz_lessons
{
 "_id": ObjectId("5fd84e467f180d5db02be90f"),
 "student_uid": NumberInt("3151989"),
 "activated": true,
}

<?php
namespace App\Models\CozLesson;
use Jenssegers\Mongodb\Eloquent\Model as Eloquent;
class CozLesson extends Eloquent {
 protected $connection = 'utalk_server'; //need to set the connection
 protected $collection = 'coz_lessons'; //pangalan ng table
 public function coz_lesson_changes()
 {
 return $this->hasMany(CozLessonChanges::class,'lesson_id','_id');
 }
 public function getLessonChanges($request) {
 $lesson = CozLesson::find($request->input('id'));
 $data = $lesson->coz_lesson_changes()->get();
 return $data;
 }
}