Laravel Eloquent:与 groupBy 相加 [英] Laravel Eloquent: sum with groupBy

问题描述

需要 eloquent/fluent 查询才能使用 groupBy 函数求和.

Need eloquent/fluent query to get sum with groupBy function.

到目前为止我已经尝试过:

So far I have tried:

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

这当然给了我调用非对象上的成员函数 groupBy() 因为 sum() 将已经执行查询并在应用 grouBy() 时准备好结果.那么有人可以指导我吗?

Which ofcourse gives me call to member function groupBy() on non-object because of the fact that sum() will already execute the query and have result ready by the time grouBy() is applied. So can anyone guide me?

推荐答案

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,
  ...
)

或者这种方式(我不会使用，因为它不会是实际的 ORM 结果):

Or this way (which I wouldn't use, since it won't be actual ORM result):

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

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

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