php - Laravel 将 where 子句添加到联合结果

Question

我正在对两个查询进行联合，我想向结果添加一个 where 子句，但 where 子句仅添加到第一个查询。我该如何解决？

    $notifications = DB::table('notifications')
        ->select(DB::raw("notifications.uuid ,notifications.brand_id" ))
    $posts = DB::table('posts')
        ->select(DB::raw("posts.uuid ,posts.brand_id" ))
        ->unionAll ($notifications)
        ->orderBy('created_at' , 'desc')
        ->where('brand_ids' , '=' , '2')
    $result  = $posts->get();

我想要这条线

           ->where('brand_id' , '=' , '2')

要添加到整个联合，但仅添加到其中一个查询。

Answer 1

我不确定是否有更好的方法，但这对我有用:

$notifications = DB::table('notifications')
                ->select(DB::raw("notifications.uuid ,notifications.brand_id"));
$posts = DB::table('posts')
        ->select(DB::raw("posts.uuid ,posts.brand_id"))
        ->unionAll($notifications)
        ->orderBy('created_at' , 'desc');
$result = DB::table(DB::raw("({$posts->toSql()}) as posts"))
                ->mergeBindings($posts)
                ->where('brand_id', '2')
                ->get();