Rails:验证两个列的唯一组合

leave_policy is table having columns :id ,:group_detail_id , employee_type_id,

leave_policy是包含以下列的表:id，:group_detail_id, employee_type_id，

I want to combination of :group_detail_id and employee_type_id should not be duplicate.

我想合并:group_detail_id和employee_type_id不应该重复。

validates_uniqueness_of :employee_type_id ,:scope => :group_detail_id

validates_uniqueness_of:employee_type_id，:scope =>:group_detail_id。

this line is not working...I don't know why?????

这条线坏了……我不知道为什么? ? ? ? ?

1 个解决方案

#1

Try:

试一试:

validate :unique_combination

def unique_combination
  self.class.exists?(
    :employee_type_id => employee_type_id,
    :group_detail_id => group_detail_id
  )
end