Laravel 5.4雄辩查询

Question

我有一个模型： 播放机， 播放， 下载， 轨道

关系：

Player has many Play and Download 
Play and Download belongs to Player 
Track has many Play and Download 

我试图找到一个查询，给我对象名单用于追踪：

Track 
--Player 
----Plays 
----Downloads 
--Player 
----Plays 
----Downloads 
--Player 
----Plays 
----Downloads 

我用它在vuejs数据表组件：

<data-tables 
    :data='data.players' 
    > 
    <el-table-column 
     prop="place_title"> 
    </el-table-column> 
    <el-table-column 
     prop="plays.length"> 
    </el-table-column> 
    <el-table-column 
     prop="downloads.length"> 
    </el-table-column> 
</data-tables> 

如果groupBy能与雄辩的对象键的作品，这将是几乎我所需要的：

$plays = $track->plays()->whereYear('created_at', $year)->whereMonth('created_at', $month)->with('player')->get(); 
$players = $plays->groupBy('player'); 

但groupBy作品有一个字符串键，以便在我的问题不会有用。

Answer 1

没有关于plays()方法和其他方面的更多信息，我能说的最好的是您发布的代码将不起作用，因为$plays是一个集合。尝试做这种方式（在这种情况下，$plays是一个查询生成器对象）：

$plays = $track->plays()->whereYear('created_at', $year)->whereMonth('created_at', $month)->with('player'); 
$players = $plays->groupBy('player')->get(); 

Answer 2

昨天我睡着了，所以无法响应更快，但我认为你可能需要的是这样的：

// Assumes you're already fetching the track e.g $track = Track::find($id); 

$plays = $track->plays()->with('player')->get(); 
$plays = $plays->groupBy('player_id'); 

$downloads = $track->downloads()->with('player')->get(); 
$downloads = $downloads->groupBy('player_id'); 

下面的代码片段只是如何在视图页面中调用此数据的示例。 Screenshot.

<h4>Track {{ $track->id }} Plays</h4> 
<ul> 
    @foreach ($plays as $play) 
    <li>Player id:{{ $play[0]->player->id }} has played {{ count($play) }} times</li> 
    @endforeach 
</ul> 
<b>Total plays: {{ count($track->plays) }}</b> 

<h4>Track {{ $track->id }} Downloads</h4> 
<ul> 
@foreach ($downloads as $download) 
    <li>Player id:{{ $download[0]->player->id }} has downloaded {{ count($download) }} times</li> 
@endforeach 
</ul> 
<b>Total downloads: {{ count($track->downloads) }}</b>