rails 4：find by includes field

Question

在Rails 3中，我有这个问题：

Supporter.includes(:person).where("concat(club_member_number, ' ', people.surname, ' ',  people.name) LIKE ?", term)

然而在Rails 4中它出现了一个错误：

ActiveRecord::StatementInvalid Exception: Mysql2::Error: Unknown column 'person.surname'

如何在Rails 4中更改查询？

Answer 1

尝试以下

Supporter.eager_load(:person).where("concat(club_member_number, ' ', people.surname, ' ',  people.name) LIKE ?", term)

或将references(:person)与includes

一起使用

Supporter.includes(:person).where("concat(club_member_number, ' ', people.surname, ' ',  people.name) LIKE ?", term).references(:person)

参考this