Laravel：使用“WithCount”时找不到列

Question

我正在尝试使用以下优先级订购：

1. 先显示给定城市的演员
2. 先显示已给定县的演员表
3. 显示未提供城市或县的剩余演员表

我的数据库表结构是：

演员表：

id
...
...
shop_id

商店：

id
..
..

位置

id
city
prefecture

可用位置

id
location_id
shop_id
..

为了过滤来自城市/地区的演员，

1. 首先需要一个店铺
2. 商店需要available_location
3. Available_location 然后从位置所在的城市或地区中过滤出来

对于那个场景，我使用了以下条件：

$casts = Cast::filterNonBusy()->attendancePresent()->where('is_deleted', 0)->with('review', 'castImage', 'shop', 'shop.location');
        if (isset($request->city) || isset($request->prefecture)) {
            $city = $request->city;
            $prefecture = $request->prefecture;

            $locationHavingCityIds = Location::where('city', $city)->pluck('id')->toArray();
            $locationHavingPrefectureIds = Location::where('prefecture', $prefecture)->pluck('id')->toArray();

            if (!empty($locationHavingCityIds)) {
                $casts = $casts->withCount(['shop', 'shop AS has_filtered_city' => function ($shopQuery) use ($locationHavingCityIds) {
                    return $shopQuery->whereHas('availableLocations', function ($availableLocationQuery) use ($locationHavingCityIds) {
                        $availableLocationQuery->whereIn('location_id', $locationHavingCityIds);
                    });
                }])->orderBy('has_filtered_city', 'DESC');
            }

            if (!empty($locationHavingPrefectureIds)) {
                $casts = $casts->withCount(['shop', 'shop AS has_filtered_prefecture' => function ($shopQuery) use ($locationHavingPrefectureIds) {
                    return $shopQuery->whereHas('availableLocations', function ($availableLocationQuery) use ($locationHavingPrefectureIds) {
                        $availableLocationQuery->whereIn('location_id', $locationHavingPrefectureIds);
                    });
                }])->orderBy('has_filtered_prefecture', 'DESC');
            }
        }

如果演员有相关城市，它会给我 has_filtered_city 为 1。 否则它给我 has_filtered_city 为 0

而且我是按照has_filtered_city排序的。

当演员没有关联城市时出现问题，它给了我一个错误：

SQLSTATE[42S22]：未找到列：1054 未知列 '订单子句'中的'has_filtered_city'（SQL：选择casts.， cp.cast_id, cp.depreciated_price from casts 内连接 cast_prices 作为cp 上cp.cast_id = casts.id 和cp.id = （从 cast_prices cp1 中选择 id WHERE cp1.cast_id = casts.id ORDER BY depreciated_price DESC LIMIT 1) 其中is_published = 1 和 （busy_till 为 null 或 busy_till reservations 中选择*，其中casts.id = reservations.cast_id 和 (status_id = 1 或 status_id = 2)) 和 存在（从attendances 中选择*，其中casts.id = attendances.cast_id 和 attendance_status = 1) 和 is_deleted = 0 并且存在 (select * from cast_prices where casts.id = cast_prices.cast_id order by name asc) 并且 (不存在 (select * 来自reservations 其中casts.id = reservations.cast_id) 或 （从reservations 中选择计数（），其中casts.id = reservations.cast_id 和 status_id = 5) is_published = 1 个订单，has_filtered_city desc、has_filtered_prefecture desc、depreciated_price desc 限制 20 偏移量 0)

我在 has_filtered_city 中哪里出错了？它有时可以完美运行，但有时会抛出“未知列：has_fiiltered_city”错误。

Answer 1

在 whereHas（嵌套）中使用 whereHas 会导致无法为 withCount 找到列的问题。在这些场景中，明智的做法是使用 innerJoin 并选择所需的列并使用该列进行过滤。

$casts = $casts->select('casts.*', 'calc_c.cast_id', 'calc_c.max_loc')->join(DB::raw("
            (SELECT casts.id AS cast_id,
                    casts.NAME,
                    casts.shop_id,
                    cal.max_loc
                    FROM casts
                    INNER JOIN (SELECT Min(CASE
                    WHEN al.city = '{$city}' THEN 1
                    WHEN al.prefecture = '{$prefecture}' THEN 2
                    ELSE 3
                    END) AS max_loc,
                    al.shop_id
                    FROM (SELECT available_locations.location_id,
                    available_locations.shop_id,
                    locations.prefecture,
                    locations.city
                    FROM available_locations,
                    locations
                    WHERE available_locations.location_id =
                    locations.id) al
                    GROUP BY al.shop_id) cal
                    ON casts.shop_id = cal.shop_id
                    ORDER BY casts.id ASC) AS calc_c"), 'casts.id', '=', 'calc_c.cast_id');

                $casts = $casts->orderBy('max_loc', 'ASC');