Monkey Patch A Class In Ruby

Posted By Weston Ganger

Sometimes you may need to override a method or add a new one to an existing class from a library or gem using a monkey patch.

I did this in an initializer and uses a snazzy method called class_eval.

MyClass.class_eval do
  def do_work
    #do work

If you did not use class_eval you can run into errors where your patch creates a new class instead of overriding. This just makes your monkey patches much more sure-fire.

Related External Links:

Article Topic:Software Development - Ruby / Rails

Date:April 05, 2016