php – 计算GroupBy不在Laravel工作

我想要用户之间的聊天数和按聊天ID分组.但查询没有给出聊天计数.它的空白.我已经在Stack Overflow( Laravel Eloquent groupBy() AND count,Laravel get count of results based on groupBy)中看到了类似的问题,并使用那些标记为正确但仍未获得所需结果的查询.

我使用以下查询：

$user_info = DB::table('chat_messages')
                ->select(DB::raw('count(*) as total'))
                ->where('viewed','=','0')
                ->groupBy('chat_id','type')
                ->get();

我的表结构如下：

{
"_id": ObjectId("571f549b1c8cb6972c8b4567"),"message": "Testing Chat Functionality","type": "singlechat","date": "2016-04-26 11:44:27","from": "56b07a5a083f119a0b8b4569","to": "56b07a5a083f119a0b8b4569","chat_id": "56f65fc51c8cb6ca1a8b4567","status": "1","updated_at": ISODate("2016-04-26T11:44:27.624Z"),"created_at": ISODate("2016-04-26T11:44:27.624Z"),"viewed": "0"
}

结果是这样的：

Array
(
[0] => Array
    (
        [_id] => Array
            (
                [chat_id] => 56f65fc51c8cb6ca1a8b4567
                [type] => singlechat
            )

        [chat_id] => 56f65fc51c8cb6ca1a8b4567
        [type] => singlechat
        [count(*) as total] => 
    )

[1] => Array
    (
        [_id] => Array
            (
                [chat_id] => 56fa3f5f1c8cb667138b4567
                [type] => groupchat
            )

        [chat_id] => 56fa3f5f1c8cb667138b4567
        [type] => groupchat
        [count(*) as total] => 
    )

)

$user_info = DB::table('chat_messages')
                ->where('viewed','0')
                ->select(DB::raw('count(chat_messages.*) as total'))
                ->groupBy('chat_id','type')
                ->get();