How to remove validation using instance_eval clause in Rails?

Question

I would like to enhance existing class using instance_eval. There original definition contains validation, which require presence of certain fields, ie:

class Du         


        

Answer 1

I had a similar problem and was able to get past it using:

class MyModel << Dummy
  # erase the validations defined in the plugin/gem because they interfere with our own
  Dummy.reset_callbacks(:validate)
  ...
end

This is under Rails 3.0. The caveat: It does remove ALL validations, so if there are others you want to keep you could try Dummy.skip_callback(...), but I could not figure out the right incantation of arguments to make that work.