[Ruby on Rails] how to override parent method?

Question

Ruby on Rails

I want to patch up one method in the gem to fit my needs. I have little experience in OOP and do not quite understand how to override the parent method so that when this method is called, mine is called? Or is it just forking the gem and editing directly?

Answer 1

You can rediscover the class in your code and rewrite the method.
But this is the wrong approach.

Answer 2

This method is probably in some module.
As an idea, you can do:

module GemModule do
class GemModuleCass << SomeOtherClass

def method
...
end

end

or

GemModule::GemClass.class_eval do
def method
...
end
end

Answer 3

If ruby ​​> 2.0, then it's better to use refine.
here is a good guide on how to do it