calling custom validation methods in Rails

Question

I just upgraded my rails to 2.3.4 and I noticed this with validations: Lets say I have a simple model Company which has a name. nothing to it. I want to run my own validation:<

Answer 1

Just FYI errors.add_to_base('error message') has been deprecated in rails 3 and got replaced by

errors[:base] << "Error message" 

Or

errors.add(:base, "Error message")