如何在rails的關係表中的額外列中插入值？

Question

考慮這些作爲我的表結構

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

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

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

我Appointments表有一個名爲relationship一個額外的列。每次當我將醫師和患者聯繫起來時，我想添加一種關係[我的例子聽起來很奇怪，我如何在這個列中插入值？

Answer 1

爲什麼不是這樣？

patient = Patient.create(:name => 'Humpty Dumpty') 
physician = Physician.create(:name => "All the King's horses and all the King's men") 
appointment = Appointment.create(:patient => patient, :physician => physician, :relationship => 'surgeon')