Laravel Eloquent:如何仅从连接表中获取某些列

问题描述

我在 Eloquent 中有 2 个连接表，即主题和用户.

I have got 2 joined tables in Eloquent namely themes and users.

主题模型:

public function user() {
  return $this->belongs_to('User');
}

用户模型:

public function themes() {
  return $this->has_many('Theme');
}

我的 Eloquent api 调用如下所示:

My Eloquent api call looks as below:

return Response::eloquent(Theme::with('user')->get());

返回主题中的所有列(很好)和用户的所有列(不好).我只需要用户模型中的用户名"列，如何将查询限制为该列?

Which returns all columns from theme (that's fine), and all columns from user (not fine). I only need the 'username' column from the user model, how can I limit the query to that?

推荐答案

更改模型以指定要选择的列:

Change your model to specify what columns you want selected:

public function user() {
  return $this->belongs_to('User')->select(array('id', 'username'));
}

并且不要忘记包括您要加入的专栏.

And don't forget to include the column you're joining on.

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