How to monkey-patch code that gets auto-loaded in Rails?

Question

I\'m monkey-patching a Rails engine with something like:

SomeClass.class_eval do
  # ...
end

The first time I hit the web site, on developm

Answer 1

EDIT: This solution only works for Rails 3+ since it's dependent on some functionality in Rails::Railtie. Put this code in an initializer.

This question is quite old, but here's a solution I found:

Rails.configuration.to_prepare do
  SomeClass.class_eval do
    # ...
  end
end

This forces Rails to reload the class on every request in development mode, but only once in production.