Laravel-未定义的变量：请求

Question

我的http：// localhost：8888 / VGL / public / category / 18？sty = 3

当dd($request->sty);等于3

但是我把$request->sty在whereHas为

未定义的变量：请求

public function show(Request $request, $id)
{
    $products = Product::with('features')
        ->whereHas('features', function ($q) {
            return $q->where('id', $request->sty);
        })
        ->where('category_id',17)
        ->get();
}

Answer 1

尝试这个

如果您想在中使用任何变量，where closure则必须在use($variable)

public function show(Request $request, $id)
{
    $products = Product::with('features')
        ->whereHas('features', function ($q) use($request) {
            return $q->where('id', $request->sty);
        })
        ->where('category_id',17)
        ->get();
}