你好我正在嘗試用 laravel 做一個(gè)測(cè)驗(yàn)應(yīng)用程序并且我正在努力檢索我的類(lèi)別問(wèn)題..我對(duì)此有一個(gè)難看的解決方案，但它不是動(dòng)態(tài)的..public function startQuiz(Request $request){ $questions = Question::all(); foreach ($questions as $key => $question) { dd($question->where('categories_id', 'LIKE', 2)->get()); // i want to change the 2 to the real category id }}我以為我可以通過(guò) $question->category->id 之類(lèi)的關(guān)系來(lái)解決這個(gè)問(wèn)題，但行不通。那是我的模型：class Question extends Model{ protected $fillable = ['question_text', 'categories_id', 'correct_answer', 'options']; protected $casts = ['options' => 'array']; public function category(){ return $this->belongsTo(Category::class, 'categories_id'); }}class Category extends Model{ protected $fillable = ['name', 'slug']; public function question() { return $this->hasMany(Question::class, 'questions_id'); }我不能以某種方式傳遞 id 并檢查它我不知道為什么..那是我傳遞類(lèi)別的表格：@section('content-categories')<div class="card"> <div class="card-header">Choose Category to Start</div> <div class="card-body"> @foreach($categories as $category) <form class="form-group" action="{{route('user.quiz', $category->slug)}}" method="post"> @csrf <input type="submit" name="categoryTest" class="form-control" value="{{$category->name}}"> </form> @endforeach </div></div>@endsection
2 回答
紅糖糍粑
TA貢獻(xiàn)1815條經(jīng)驗(yàn) 獲得超6個(gè)贊
對(duì)于您的表單列表，您可能已經(jīng)擁有$categories = Categories::all(). 接下來(lái)要在提交后獲取該類(lèi)別的所有問(wèn)題，您應(yīng)該首先獲取類(lèi)別，然后再針對(duì)它提出問(wèn)題。假設(shè)您的表單中有類(lèi)別 ID：
$categoryQuestions = Category::find($request->get('id'))->questions;我看到您正在為您的網(wǎng)址使用類(lèi)別 slug，也可以使用它來(lái)查找類(lèi)別：
public function startQuiz(Request $request, string $slug){
$questions = Category::whereSlug($slug)->first()->questions;
...
}獎(jiǎng)勵(lì)：在您的服務(wù)提供商中，您可以像這樣將 {category} 直接綁定到您的模型：
Route::bind('category', function($value) {
return Category::whereSlug('slug', $value)->first();
});然后你的類(lèi)別將在控制器方法中可用：
public function startQuiz(Request $request, Category $category){
$questions = $category->questions;
}
猛跑小豬
TA貢獻(xiàn)1858條經(jīng)驗(yàn) 獲得超8個(gè)贊
嘗試替換'LIKE'為'='. dd(...)并像這樣刪除：
foreach ($questions as $key => $question) {
dd($question->where('categories_id', 'LIKE', 2)->get());
}
到：
foreach ($questions as $key => $question) {
$question->where('categories_id', '=', 2)->get();
}
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