Laravel 5 中使用查询生成器的复杂查询答案

【问题标题】：Complex query with query builder in Laravel 5Laravel 5 中使用查询生成器的复杂查询
【发布时间】：2015-12-21 16:30:23
【问题描述】：

我有 3 张桌子，

subscribers:

subscribers_lists_subscribers:

还有subscribers_lists:

我正在尝试这样的查询：

$baseQuery = DB::table('subscribers_lists')
    ->leftjoin('subscribers_lists_subscribers', 'subscribers_lists.id', '=', 'subscribers_lists_subscribers.subscribers_list_id')
    ->leftjoin('subscribers',  'subscribers_lists_subscribers.subscriber_id', '=', 'subscribers.id')
    ->select(
        'subscribers_lists.id as count_clickers',
        DB::raw('count(subscribers_lists_subscribers.subscribers_list_id where subscribers.status = "Active") as count_active')
        'subscribers_lists.updated_at as last_activity'
    )
    ->groupBy('subscribers_lists.id');

我需要这个：

where subscribers.status = "Active"

我遇到了一个错误，谁能告诉我我做错了什么？

【问题讨论】：

您不能只为一个字段使用where。正确的语法是将where 放在select 之后和groupBy 之前。
那么，我该怎么做呢，请帮忙
错误信息是什么？
您应该考虑将这些屏幕截图替换为文本等价物。

标签： mysql laravel laravel-5 query-builder

【解决方案1】：

您在其中一个选择之后缺少一个逗号，并且您不能简单地在选择语句中放置诸如“where subscribers.status = "Active"”之类的内容。试试这个：

$baseQuery = DB::table( 'subscribers_lists')
    ->leftJoin('subscribers_lists_subscribers', 'subscribers_lists.id', '=', 'subscribers_lists_subscribers.subscribers_list_id')
    ->leftJoin('subscribers',  'subscribers_lists_subscribers.subscriber_id', '=', 'subscribers.id')
    ->select(
        'subscribers_lists.id as count_clickers',
        DB::raw('COUNT(subscribers_lists_subscribers.subscribers_list_id) as count_active'),
        'subscribers_lists.updated_at as last_activity'
    )
    ->where('subscribers.status', 'Active')
->groupBy('subscribers_lists.id');

【讨论】：

【解决方案2】：

我做到了，

   $baseQuery = DB::table(  'subscribers_lists')
                            ->leftjoin('subscribers_lists_subscribers', 'subscribers_lists.id', '=', 'subscribers_lists_subscribers.subscribers_list_id')
                            ->leftjoin('subscribers',  'subscribers_lists_subscribers.subscriber_id', '=', 'subscribers.id')
                            ->select(
                                        'subscribers_lists.id',
                                        'subscribers_lists.name',
                                        'subscribers_lists.id as count_openers',
                                        'subscribers_lists.id as count_clickers',
                                        DB::raw('count(case when subscribers.status = "Active" then 1 else null end) as count_active'),
                                        DB::raw('count(case when subscribers.status = "Unsubsribed" then 1 else null end) as count_unsubsribers'),
                                        DB::raw('count(case when subscribers.status = "Bounced" then 1 else null end) as count_bounced'),
                                        DB::raw('count(subscribers_lists_subscribers.subscribers_list_id) as count_total'),
                                        'subscribers_lists.updated_at as last_activity'
                                    )
                            ->where('subscribers_lists.user_id', '=', $user_ID)
                            ->groupBy('subscribers_lists.id');
    $totalData  =   $baseQuery->count();

【讨论】：