I'm new to laravel, I want to delete the curriculum, it will delet the grades associated with it, and the subjcts that are associated with that grades

Thanks, everyone I have found the answer to my question, by myself.

public function delete(Request $request)
    {
        // todo: delete subjects and grades that fall under this curriculum
        $grades = Grade::where('curriculumId', $request->curriculumId)->pluck('id')->all();
        $subjects = Subject::where('gradeId', $grades)->pluck('id')->all();
        $sujectCount = Subject::destroy($subjects);
        $gradeCount = Grade::destroy($grades);
        $curriculumCount = Curriculum::destroy($request->curriculumId);

        return [
            'status' => 'success',
            'deletedCurriculums' => $curriculumCount,
            'deletedGrades' => $gradeCount,
            'deletedSubjects' => $sujectCount,
        ];
    }