Rails返回所有二级关联 [英] Rails returning all of second level association

问题描述

我目前对三种模型感兴趣：地区，座位和用户。

I currently have three models that I am interested in: Region, Seat and User.

地区有很多座位，而座位有很多可用的用户。

Region has many seats and seats have many available users.

我想知道在Rails中最有效的方法是检索特定区域内座位的所有可用用户。

I'd like to know what is the most efficient way in Rails to retrieve all of the available users for the seats which sit under a particular region.

谢谢。

推荐答案

尝试：

User.joins(seat: :region).where(regions: { id: REGION_ID_HERE })

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