Check validates_uniqueness_of in rails for two values in or condtion

Question

i'm having problem in checking validates_uniqueness_of which has two condtion.

Class name is InviteGuest

class InviteGuest < ActiveRecord::Base
  attr_accessible :invite_id, :email, :first_name, :last_name, :random_no

  validates_presence_of :invite_id, :unless => :random_no?

  validates_uniqueness_of :email, :scope => [:invite_id] 

Here i'm checking invite_id or :random number for presence. so here my :email feilds are entering first with unique :random_no .which works fine.and i;m validates_uniqueness_of :email, :scope => [:invite_id] but it's not allowing me to enter same :email for different :random_no. i have to put or condition. it's cheking for :invite_id but i would like to check it for :random_no if :invite_id is not present. but it's not allowing me to enter :email for different :random_no.

Any idea??

Answer 1

It sounds to like your scope is not set correctly. You should scope on random_no:

validates_uniqueness_of :email, scope: [:invite_id, :random_no]