基于 table in rails 的一个属性的 2 个不同模型

Question

假设我只想为 rails.but ruby 中的用户制作一个 table 我想根据用户的角色再制作 2 个模型。这样我就可以在它们之间使用另一个多对多关系。

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

class Physician < User
  has_many :appointments
  has_many :physicians, through: :appointments
end

class User < ApplicationRecord

end

class Appointment < ApplicationRecord
  belongs_to :physician
  belongs_to :patient
end

Answer 1

设置约会关联时需要手动指定外键列：

class Physician < User
  has_many :appointments, foreign_key: :physician_id 
  has_many :patients, through: :appointments
end

class Patient < User
  has_many :appointments, foreign_key: :patient_id 
  has_many :physicians, through: :appointments
end

还要确保您已向用户添加 type 列以使 single table inheritance 正常工作。

2 different model based on one attribute of a table in rails