许多一对多：的has_many：通过和用户表关系问题导轨4

Question

我对车型设置：

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 

在我的应用程序LogedIn-用户是无论是医生，病人或我得到了管理员明白如何医生，并与预约医患关系的工作，但如何建立用户模型，并表为

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

我知道我在这里失去了关键的自我协会，但我怎么能做到这一点，或任何其他方式为此设置这些模型和表格。提前致谢。

Answer 1

你有错字在这里：class User_type < ActiveRecord::Base belongs-to :doctors, class_name: "USER" belongs_to :patients, class_name: "USER" end

应该belongs_to，你肯定那不是你的问题？

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 

希望这会对你有用，如果你能正确理解多对多的关系。