ActionController::UrlGenerationError ... missing required keys

output.txt

› ruby rails3_works.rb

Finished in 0.001542s, 648.5084 runs/s, 1297.0169 assertions/s.

1 runs, 2 assertions, 0 failures, 0 errors, 0 skips


› ruby rails4_fails.rb

Finished tests in 0.013107s, 76.2951 tests/s, 0.0000 assertions/s.

    1) Error:
BugTest#test_routes:
ActionController::UrlGenerationError: No route matches {:locale=>:rose, :action=>"show", :controller=>"flowers", :id=>nil, :format=>nil} missing required keys: [:id]
    /.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.0.2/lib/action_dispatch/journey/formatter.rb:39:in `generate'
    /.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:601:in `generate'
    /.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:631:in `generate'
    /.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:667:in `url_for'
    /.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.0.2/lib/action_dispatch/routing/url_for.rb:155:in `url_for'
    /.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:234:in `call'
    /.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:274:in `block (2 levels) in define_url_helper'
    rails4_fails.rb:47:in `test_routes'


1 tests, 0 assertions, 0 failures, 1 errors, 0 skips

rails3_works.rb

File.write('Gemfile', <<-GEMFILE)
  source 'https://rubygems.org'
  gem 'rails', '3.2.16'
  gem 'minitest'
GEMFILE

system 'bundle update'

require 'bundler'
Bundler.setup(:default)

require 'rails'
require 'action_controller/railtie'

class TestApp < Rails::Application
  config.root = File.dirname(__FILE__)
  config.session_store :cookie_store, key: 'cookie_store_key'
  config.secret_token    = '6103e0a02bd376f18cd16ab84189925f'
  config.secret_key_base = '6103e0a02bd376f18cd16ab84189925f'

  config.logger = Logger.new($stdout)
  Rails.logger  = config.logger

  routes.draw do
    scope "(:locale)", :locale => /([a-zA-Z]{2}[-_])?[a-zA-Z]{2}/ do
      resources :flowers  
    end
  end
end

class TestController < ActionController::Base
  include Rails.application.routes.url_helpers

end

require 'minitest/autorun'
require 'rack/test'

class BugTest < MiniTest::Unit::TestCase
  include Rack::Test::Methods
  include Rails.application.routes.url_helpers

  def test_routes
    Rails.application.routes.default_url_options[:locale] = :en_GB
    assert_equal "/en_GB/flowers/rose", flower_path(:rose)

    Rails.application.routes.default_url_options[:locale] = nil
    assert_equal "/flowers/rose", flower_path(:rose)
  end

  private
    def app
      Rails.application
    end
end

rails4_fails.rb

File.write('Gemfile', <<-GEMFILE)
  source 'https://rubygems.org'
  gem 'rails', '4.0.2'
  gem 'minitest'
GEMFILE

system 'bundle update'


require 'bundler'
Bundler.setup(:default)

require 'rails'
require 'action_controller/railtie'

class TestApp < Rails::Application
  config.root = File.dirname(__FILE__)
  config.session_store :cookie_store, key: 'cookie_store_key'
  config.secret_token    = '6103e0a02bd376f18cd16ab84189925f'
  config.secret_key_base = '6103e0a02bd376f18cd16ab84189925f'

  config.logger = Logger.new($stdout)
  Rails.logger  = config.logger

  routes.draw do
    scope "(:locale)", :locale => /([a-zA-Z]{2}[-_])?[a-zA-Z]{2}/ do
      resources :flowers  
    end
  end
end

class TestController < ActionController::Base
  include Rails.application.routes.url_helpers

end

require 'minitest/autorun'
require 'rack/test'

class BugTest < MiniTest::Unit::TestCase
  include Rack::Test::Methods
  include Rails.application.routes.url_helpers

  def test_routes
    Rails.application.routes.default_url_options[:locale] = :en_GB
    assert_equal "/en_GB/flowers/rose", flower_path(:rose)

    Rails.application.routes.default_url_options[:locale] = nil
    assert_equal "/flowers/rose", flower_path(:rose)
  end

  private
    def app
      Rails.application
    end
end