Pin your monkey patches to certain gem version in rails

gistfile1.rb

# in an early initializer
def PinMonkeypatch!(gem_name, expected_version)
  if gem_spec = Gem.loaded_specs[gem_name]
    actual_version = gem_spec.version.to_s

    if actual_version != expected_version
      raise "Monkeypatch for #{gem_name} requires version "\
        "#{expected_version}, but current version is #{actual_version}"
    end
  else
    raise "Monkeypatch failed for #{gem_name}, gem not found"
  end
end

# in monkeypatching initializer, e.g. config/initializers/patch_actionview_19967.rb
PinMonkeypatch! 'actionview', '4.1.11'

module ActionView::Helpers::TranslationHelper
  …
end