Selective validation? Is it possible?

Hello Petr,

I have a Product model and products table. Im using acts_as_tree
structure. I would like active record validation to be done on children
only. Anyway to do this?

The root product is the product who has no parent.
So in your validation, you could pass an :if option and a condition
in the block :

:if => { |r| r.parent }

Example :
validates_presence_of :name, :if => { |r| r.parent }

   -- Jean-François.