Question

Is there a way to drop a validation that was set in Rails plugin (or included module)?
Let’s say I have some model with module included in it:

class User < ActiveRecord::Base
  include SomeModuleWithValidations
  # How to cancel validates_presence_of :something here?
end

module SomeModuleWithValidations
  def self.included(base)
    base.class_eval do
      validates_presence_of :something
    end
  end  
end

My only idea so far was to do something like:

validates_presence_of :something, :if => Proc.new{1==2}

which would work, I think, but it isn’t particulary pretty.

Answer 1

See http://casperfabricius.com/site/2008/12/06/removing-rails-validations-with-metaprogramming/