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

In Rails 4.1,

I was able to do _validate_callbacks.clear. In my case, I wanted all the validations for a gem removed, so I could create my own. I did this in a module that was patched into the class.

Module #Name
   extend ActiveSupport::Concern
   included do
        _validate_callbacks.clear
        #add your own validations now
   end
end