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

Wanted to add that, if you're trying to clear validations on a instance of your Model (not the entire model class), don't do my_dummy._validate_callbacks.clear, as that will clear validations on every instance (and future instance) of your Dummy model class.

For just the instance (and if you wanted to reinstate the validations later), try the following:

1. Create a copy of the validate callbacks (if you want to reinstate later): my_dummy_validate_callbacks = my_dummy._validate_callbacks.clone

2. Set the validate callbacks on your instance to empty: my_dummy._validate_callbacks = {}

3. Do what you want on my_dummy validation free!

4. Reinstate the callbacks: my_dummy._validate_callbacks = my_dummy_validate_callbacks