Как ограничить вопросы в php?

Question

Я использую флаттер и php, и мне нужно получить только 40 случайных вопросов из базы данных, но я новичок в php! Как я могу это сделать? См код ниже

public function index(){

$user = Auth::user();
$topics = Topic::all()->toArray();
$questions = Question::all()->toArray();

    return response()->json(array('users' =>$user,'topics'=>$topics,'questions'=>$questions), 200);

// return response()->json(['data' => $posts], 200, [], JSON_NUMERIC_CHECK);
}

public function show_question($id){
    $topic = Topic::findOrFail($id);
    $user_id = Auth::user()->id;
    $existing = Answer::where('user_id',$user_id)->where('topic_id',$id)->first();
    if($existing == ""){
        $topic_ques = Question::where('topic_id', $id)->get()->shuffle(); 
        $questions = $topic_ques->only(40);
        return response()->json(array('topic'=>$topic,'questions' => $questions), 200);
    }
    else{
      return response()->json("test already given", 300);  
    }
}

Answer 1

public function index(){

$user = Auth::user();
$topics = Topic::all()->toArray();
$questions = Question::all()->random(40)->toArray();

    return response()->json(array('users' =>$user,'topics'=>$topics,'questions'=>$questions), 200);

// return response()->json(['data' => $posts], 200, [], JSON_NUMERIC_CHECK);
}

public function show_question($id){
    $topic = Topic::findOrFail($id);
    $user_id = Auth::user()->id;
    $existing = Answer::where('user_id',$user_id)->where('topic_id',$id)->first();
    if($existing == ""){
        $topic_ques = Question::where('topic_id', $id)->get()->shuffle(); 
        $questions = $topic_ques->only(40);
        return response()->json(array('topic'=>$topic,'questions' => $questions), 200);
    }
    else{
      return response()->json("test already given", 300);  
    }
}

Answer 2

Попробуйте:

$questions = Question::where('topic_id', $id)->inRandomOrder()->take(40)->get();

См. Laravel документы для получения дополнительной информации.

Answer 3

 $topic_ques = Question::where('topic_id', $id)->limit(40)->get()->shuffle(); 

Просто используйте функцию предела.