How do I validate two fields for uniqueness
ruby-on-rails
Solution
what about this solution Validate combined values
validates :employee_id, uniqueness: { scope: :area_id }
Problem
I need to validate the uniqueness of two fields in an object (row) before I add them. Employee_id and area_id are the two fields in my emp_area table. There can be multiple records with the same employee_id and multiple records with the same area_id, but no two records can have the same employee_id and the same area_id. This is sort of like two fields making up a primary-key or unique-key. How can I do this. Thanks