hasOne(Teacher::class, 'id', 'teacher_id')->bind(['teacher_account'=>'account', 'teacher_name']); } public function subject() { return $this->hasOne(Subject::class, 'id', 'subject_id')->bind(['subject_name', 'english_name']); } public function student() { return $this->hasOne(Student::class, 'id', 'student_id')->bind(['student_name', 'student_account'=>'account']); } }