[Rails] Validating numericality based on related attribute value?

Matthew Law
Wed, 07 Jun 2006 21:05:37 -0000

I have a price attribute in my model which I need to validate as a
positive number if the attribute price_terms.requires_value is equal to
''Y'', otherwise price can be blank or zero.  Price_terms is a
select list
which my model table belongs_to.

How do I do this? - I tried doing this:

validates_numericality_of :price, :if =>
self.price_term.requires_value.upcase == ''Y''

But that doesn''t work...

Thanks in advance,

Matt.