如何使用whereHas优化此查询？

Question

我正在使用此查询过滤出包含城市和类别的商店.当我在stores表中有大约1000条记录时,它工作正常.现在,当我有5000条记录时,生成结果大约需要3-10秒.

在我的案例中,商店属于多个类别.

如何使用Eloquent orm或DB::raw()？来优化此查询？

$stores = Store::where('city_id', $city_id)
        ->where('disabled', '0')
        ->whereHas('categories', function($q) use ($category_id){
            $q->where('category_id', '=', $category_id);
        })
        ->orderBy('rating','DESC')->paginate(10);

Answer 1

使用whereRawas DB::raw()或者DB::select()不能paginate()使用集合解决了我的问题.

问题:

执行时间:11.449304103851s

city_id = 6 & $category_id = 1

$stores = Store::where('city_id', $city_id)
        ->where('disabled', '0')
        ->whereHas('categories', function($q) use ($category_id){
            $q->where('category_id', '=', $category_id);
        })
        ->orderBy('rating','DESC')->paginate(10);

解:

执行时间:0.033660888671875s

city_id = 6 & $category_id = 1

$stores = Store::
    where('city_id', $city_id)
    ->where('disabled', '0')
    ->whereRaw('stores.id in (select store_id from store_categories_pivot where category_id = ?)', [$category_id])
    ->orderBy('rating','DESC')
    ->paginate(10);