Allow foo_path(foo) even with :locale prefix in routes in Rails 3.

patch_rails_i18n_routing_positional_arguments.rb

unless Rails::VERSION::STRING == "3.2.2"
  raise "Rails version changed. Revisit overrides and make sure they're still good!"
end

# If routes are prefixed with a :locale, you can no longer do
# `foo_path(foo)` but only `foo_path(id: foo)`, since it expects
# the first of any non-hash arguments to be the locale.
# This monkeypatch fixes that by never allowing locale as the first
# non-hash argument, and instead always setting current locale as a
# hash option.

module HandlePositionalArgsWithLocalePrefix
  def handle_positional_args(options)
    pk = options[:_positional_keys]
    if pk && pk[0] == :locale
      pk.shift
      options[:locale] ||= I18n.locale
    end
    super
  end
end

# Change this to your app name.
MyAppName::Application.routes.extend HandlePositionalArgsWithLocalePrefix