Rails关联数据排序

Question

是否可以按教师姓名排列school.classrooms的结果？我想直接在关联中这样做，而不是单独调用。

class School < ActiveRecord::Base 
    has_many :classrooms 
end 


class Classroom < ActiveRecord::Base 
    belongs_to :school 
    belongs_to :teacher 
end 


class Teacher < ActiveRecord::Base 
    has_one :classroom 
end 

Answer 1

这应该如果你正在使用的轨道3.X

school.classrooms.includes(:teacher).order("teachers.name")