public function store(Request $request, $lecture_id, $subject_id) { $this->validate($request, ['title' => 'required', 'description' => 'required']); $subject = Subject::find($subject_id); Log::info('$subject_id: ' . $subject->title); $topic = new Topic(); $topic->title = $request->title; $topic->description = $request->description; $topic->topic_content = $request->topic_content; $topic->subject()->associate($subject); $topic->save(); return redirect('/lectures/' . $lecture_id . '/subjects/' . $subject_id . '/topics'); }