Conditional Validations in Rails
August 28th, 2007 by pyratThe single table inheritance feature of rails is really useful. Today I needed to turn off validations in the extended model that were implemented in the base class.
I scratched my head for a while then realised its actually very simple.
class Page < ActiveRecord::Base
validates_presence_of :title, :slug,
:description, :if => :is_a_page?
private
def is_a_page?
self.class == ‘Page’
end
end
The above validation only takes place for the base class and not for classes that extend this. The beauty of STI being that the database stays pretty clean.
