How do I validate that two values do not equal each other in a Rails model?

Question

I have a User model, which has an email and a password field. For security, these may not be equal to each other. How can I define this in my model?

Answer 1

all you need is to create validation rule in your model for example

class User < ActiveRecord::Base
  def validate_on_create
    if email == password
      errors.add("password", "email and password can't be the same")
    end
  end
end