Logical Conditional Model Level Validation

Guys I have a model say Contacts and it has following attributes id,email and address Now I want to store only those tuple whose email as well as address attributes are unique. I have tried this one validates_uniqueness_of :email && :address

but it doesn't work. So asking for help

It's done. Should be written validates_uniqueness_of :email, :scope=>:address, :message=>"your error message"