Rails范围 - 如何连接3个表

Question

我有3张桌子：

schools{id, name, desc, adress}
reviews{id, content, rating, school_id, user_id} # user_id & schoold_id is foregin keys
users{id, name, city}

如何编写rails范围，连接所有3个表并获取列 schools.name，reviews.content和reviews.rating，users.name

我正在使用rails 3.2

Answer 1

scope :mashup, joins(:school, :user).select("content, rating, schools.name as sname, users.name as uname")

您可以了解更多here