导轨4：找到包括现场

Question

在Rails 3我有此查询：

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

然而，在轨道4,5它througth错误：

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

我怎么能更改查询，为它工作在Rails 4中？

Answer 1

尝试以下

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

，或者使用与references(:person)includes

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

参考this