未定义的列：7错误：列不存在

Question

我正在使用PostgreSQL。 当我使用“”引号而不是“”时，会发生此错误。 很简单，我会告诉你。 这个SQL查询给我描述了问题标题中的错误

select "sub"."code", "sub"."customer_id", "sub"."data", "sub"."event_count", "sub"."created_at"
from (select "customer_event_types"."code",
             "customer_events"."customer_id",
             "customer_events"."data",
             count(customer_events.id)       event_count,
             max(customer_events.created_at) created_at
      from "customers"
               inner join "customer_events" on "customer_events"."customer_id" = "customers"."id"
               inner join "customer_event_types"
                          on "customer_events"."customer_event_type_id" = "customer_event_types"."id"
      group by "customer_event_types"."code", "customer_events"."customer_id", "customer_events"."data"
      having count(customer_events.id) = 1) as "sub"
where "sub"."code" = "registration"

您在最后一行看到“注册”了吗？ 它给了我错误。

[42703]错误：列“注册”不存在

这是正确代码的示例：

select "sub"."code", "sub"."customer_id", "sub"."data", "sub"."event_count", "sub"."created_at"
from (select "customer_event_types"."code",
             "customer_events"."customer_id",
             "customer_events"."data",
             count(customer_events.id)       event_count,
             max(customer_events.created_at) created_at
      from "customers"
               inner join "customer_events" on "customer_events"."customer_id" = "customers"."id"
               inner join "customer_event_types"
                          on "customer_events"."customer_event_type_id" = "customer_event_types"."id"
      group by "customer_event_types"."code", "customer_events"."customer_id", "customer_events"."data"
      having count(customer_events.id) = 1) as "sub"
where "sub"."code" = 'registration'

这个对我有用。 所以，这个问题。 如何为雄辩的ORM解释我需要“注册”而不是“注册”？

这是我的口才代码：

$set = DB::query()->fromSub(function ($query) {
    $query->from('customers')->select('customer_event_types.code',
        'customer_events.customer_id',
        'customer_events.data',
        DB::raw('count(customer_events.id) event_count'),
        DB::raw('max(customer_events.created_at) created_at'))
        ->join('customer_events', 'customer_events.customer_id', '=', 'customers.id')
        ->join('customer_event_types', 'customer_events.customer_event_type_id', 'customer_event_types.id')
        ->groupBy('customer_event_types.code', 'customer_events.customer_id', 'customer_events.data')
        ->having(DB::raw('count(customer_events.id)'), '=', 1);
}, 'sub')
    ->select('sub.code', 'sub.customer_id', 'sub.data', 'sub.event_count', 'sub.created_at')
    ->when($firstItem, function ($query, $events) {
        // making conditions where dynamic 

        $whereColumn = [];
        foreach ($events as $event) {

            $whereColumn[] = ["sub.code", "=", (string)$event->event_code];

            if (isset($event->after_than_minutes_ago) && !empty($event->after_than_minutes_ago) && is_numeric($event->after_than_minutes_ago)) {
                $whereColumn[] = ["sub.created_at", '>', Carbon::now()->subMinutes($event->after_than_minutes_ago)->toString()];
            }
            // произошло раньше, чем <число> минут назад
            if (isset($event->before_than_minutes_ago) && !empty($event->before_than_minutes_ago) && is_numeric($event->before_than_minutes_ago)) {
                $whereColumn[] = ["sub.created_at", '<', Carbon::now()->subMinutes($event->before_than_minutes_ago)->toString()];
            }

            $query->whereColumn($whereColumn);
            $whereColumn = [];
        }
        return $query;
    })
    ->get(); 

如您所见，此代码比SQL等效代码更难。 它使where来自输入数据的条件。 但这似乎并不重要。 我有同样的错误，与引号有关。

SQLSTATE [42703]：未定义的列：7错误：列“ registration”不存在第1行：... r_events.id）= $ 1）as“ sub”其中（“ sub”。“ code” =“ registrat ... ^（SQL：从中选择“ sub”。“ code”，“ sub”。“ customer_id”，“ sub”。“ data”，“ sub”。“ event_count”，“ sub”。“ created_at”从（选择“ customer_event_types” 。“代码”，“ customer_events”。“ customer_id”，“ customer_events”。“数据”，count（customer_events.id）event_count，max（customer_events.created_at）created_at来自“ customers”内部联接“ customer_events”上的“ customer_events”。 “ customer_id” =“客户”。“ id”内部联接“ customer_events”上的“ customer_event_types”。“ customer_event_type_id” =“ customer_event_types”。“ id”按“ customer_event_types”分组。“ code”，“ customer_events”。“ customer_id”， count（customer_events.id）= 1）的“ customer_events”。“ data”作为“ sub”，其中（“ sub”。“ code” =“ registration”和“ sub”。” created_at”>“周五8月30日10： 03:14 GMT + 0000“和” sub“。” created_at“ <” 2019年8月30日星期五10:38:14 GMT + 0000“））

Answer 1

从文档 ：

whereColumn方法可用于验证两列相等：

您可能应该使用whereIn或where验证一列的值等于某物，而不是whereColumn验证两列是否相等。 （然后，应使用单引号正确生成查询）。