Question

我正在建立医生预约网站。我有用户模型，我想把它分成两部分：医生和病人。我试过了：

class User < ActiveRecord::Base
end

class Appointment < ActiveRecord::Base
    belongs_to :physician, class_name: "User"
    belongs_to :patient, class_name: "User"     
   end

class Physician < User
  has_many :appointments
  has_many :patients, through: :appointments, source: "User"
end

class Patient < User
  has_many :appointments
  has_many :physicians, through: :appointments, source: "User"
end

问题：如何在appointsments表中获取physician_id和patient_id列？我选择了这种方式，因为当医生和患者模型分开时，注册将是问题（我想是这样......）。

Answer 1

我认为您正走在正确的道路上，只需要进行迁移即可在约会表上添加对医生和患者的引用。虽然，您不需要将源属性添加到患者或医生中，因为Rails会推断出这些属性！

我认为我也更喜欢采用医生和患者模型的这种方法，虽然不是为了注册目的，而是为了单一责任！

如果有效，请告诉我

Answer 2

add_reference :appointments, :patient, foreign_key: true
add_reference :appointments, :physician, :foreign_key: true

这两次迁移应该为表添加外键。检查文档以确保我的语法绝对正确。

Answer 3

除了建议的更改dpalazzari之外，我相信您还需要进行以下更改：

class Appointment < ActiveRecord::Base
  belongs_to :physician, class_name: "Physician", inverse_of: :appointments
  belongs_to :patient,   class_name: "Patient",   inverse_of: :appointments     
end

class Physician < User
  has_many :appointments, foreign_key: :physician_id, inverse_of: :physician
  has_many :patients, through: :appointments, source: "User"
end

class Patient < User
  has_many :appointments, foreign_key: :patient_id, inverse_of: :patient
  has_many :physicians, through: :appointments, source: "User"
end

从一个模型制作两个模型

3 个答案: