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