我正在尝试使用关键字 AS 来组合两列，以便我可以对该列进行排序。

这是目前的完整查询。

$quotes = Quote::where('created_at', '>=', $date)
        ->where('created_at', '<=', date('Y-m-d').' 23:59:59')
        ->order_by('upvotes', 'desc')
        ->paginate(5);

我想要做

->order_by('(downvotes - upvotes) as votes', 'desc')

谢谢。

Solution

似乎使用 DB::raw() 是唯一的方法，Laravel/Eloquent 只是不理解 AS。

工作解决方案是

 $quotes = Quote::select(array('id', DB::raw('(downvotes - upvotes) as votes'), 'upvotes', 'downvotes', 'etc')) // Rest of column needed.
        ->where('created_at', '>=', $date)
        ->where('created_at', '<=', date('Y-m-d').' 23:59:59')
        ->order_by('votes', 'asc')
        ->paginate(5);

尝试这个：

Quote::where('created_at', '>=', $date)
        ->select(array('id',DB::raw('(downvotes - upvotes) as votes'))) //and what you need
        ->where('created_at', '<=', date('Y-m-d').' 23:59:59')
        ->order_by('upvotes', 'desc')
        ->order_by('votes', 'desc')
        ->paginate(5);