ActiveRecord返回ActiveRecord :: Relation

Question

u = User.where("name = ?", "mateusz").limit(1)
u.class
=> ActiveRecord::Relation

所以我不能像u.email这样做..find做对了,返回User对象.有没有机会从ActiveRecord :: Relation对象获取User对象？

Answer 1

你应该打电话first或last在ActiveRecord::Relation对象上:

u = User.where("name = ?", "mateusz").first