many-to-many - mongoid 唯一性验证多对多关系

Question

我有以下协会

class Employee
  include Mongoid::Document
  employee_id :name
 references_many :companies, stored_as => :array, :inverse_of => :employees
end

class Company
  include Mongoid::Document
  field :name
 references_many :employees, stored_as => :array, :inverse_of => :companies
end

现在如何检查employee_id单个员工的唯一性company

Answer 1

嘿，加根。首先，需要更正 Employee 模型中的这一行：

employee_id :name

对于验证，您应该能够这样做：

class Employee
  include Mongoid::Document

  field :employee_id, :type => Integer

  references_many :companies, :stored_as => :array, :inverse_of => :employees

  validates_uniqueness_of :employee_id
end

您可以像这样轻松测试它：

>> e = Employee.create :employee_id => 10
 => #

>> Employee.new(:employee_id => 10).valid?
 => false