許多一對多：的has_many：通過和用戶表關係問題導軌4

Question

我對車型設置：

class Doctor < ActiveRecord::Base 
    has_many :appointments 
    has_many :patients, :through => :appointments 
end 

class Appointment < ActiveRecord::Base 
    belongs_to :doctor 
    belongs_to :patient 
end 

class Patient < ActiveRecord::Base 
    has_many :appointments 
    has_many :physicians, :through => :appointments 
end 

在我的應用程序LogedIn-用戶是無論是醫生，病人或我得到了管理員明白如何醫生，並與預約醫患關係的工作，但如何建立用戶模型，並表爲

class User_type < ActiveRecord::Base 
    belongs_to :doctors, class_name: "USER" 
    belongs_to :patients, class_name: "USER" 
end 

我知道我在這裏失去了關鍵的自我協會，但我怎麼能做到這一點，或任何其他方式爲此設置這些模型和表格。提前致謝。

Answer 1

你有錯字在這裏：class User_type < ActiveRecord::Base belongs-to :doctors, class_name: "USER" belongs_to :patients, class_name: "USER" end

應該belongs_to，你肯定那不是你的問題？

Answer 2

class User < ActiveRecord::Base 
    has_one :doctor 
    has_one :patient 
end 

class Doctor < ActiveRecord::Base 
    belongs_to :user 
    has_many :appointments 
    has_many :patients, :through => :appointments 
end 

class Appointment < ActiveRecord::Base 
    belongs_to :physician 
    belongs_to :patient 
end 

class Patient < ActiveRecord::Base 
    belongs_to :user 
    has_many :appointments 
    has_many :physicians, :through => :appointments 
end 

希望這會對你有用，如果你能正確理解多對多的關係。