sql - Laravel Eloquent : sum with groupBy

Question

需要 Eloquent /流畅的查询才能使用 groupBy 函数获取总和。

到目前为止我已经尝试过:

    $this->data['no_of_pages'] = Document::sum('no_of_pages')
                                ->groupBy('users_editor_id');

这当然让我在非对象上调用成员函数groupBy()，因为 sum() 已经执行查询并在应用 grouBy() 时已经准备好结果。那么有人可以指导我吗？

Answer 1

Document::groupBy('users_editor_id')
   ->selectRaw('sum(no_of_pages) as sum, users_editor_id')
   ->pluck('sum','users_editor_id');

   // originally lists(), which was deprecated in favour of pluck in 5.2
   // and dropped completely in 5.3
   // ->lists('sum','users_editor_id');


// returns array like this:
array(
  users_editor_id => sum,
  ...
)

或者这样(我不会使用它，因为它不是实际的 ORM 结果):

Document::groupBy('users_editor_id')
   ->selectRaw('*, sum(no_of_pages) as sum')
   ->get();

// returns collection of Document pseudo models with additional sum field