Rails關聯數據排序

Question

是否可以按教師姓名排列school.classrooms的結果？我想直接在關聯中這樣做，而不是單獨調用。

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

這應該如果你正在使用的軌道3.X

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