Clear route defaults using :name => nil #663

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@671 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_controller/routing.rb

@@ -176,6 +176,7 @@ module ActionController
         options = options.symbolize_keys
         defaults = request.path_parameters.symbolize_keys
         expand_controller_path!(options, defaults)
+        defaults.delete_if {|k, v| options.key?(k) && options[k].nil?} # Remove defaults that have been manually cleared using :name => nil
 
         failures = []
         selected = nil

actionpack/test/controller/routing_tests.rb

@@ -185,7 +185,7 @@ class RouteTests < Test::Unit::TestCase
     assert_equal nil, @route.recognize([])[0]
     assert_equal nil, @route.recognize(%w{some_static route with more than expected})[0]
   end
-
+  
   def test_basecamp
     route 'clients/', :controller => 'content'
     verify_generate('clients', {}, {:controller => 'content'}, {}) # Would like to have clients/
@@ -422,6 +422,11 @@ class RouteSetTests < Test::Unit::TestCase
     @set.connect ':action/:controller'
     verify_generate('index/content', options)
   end
+  
+  def test_default_dropped_with_nil_option
+    @request.path_parameters = {:controller => 'content', :action => 'action', :id => '10'}
+    verify_generate 'content/action', {:id => nil}
+  end
 end
 
 #require '../assertions/action_pack_assertions.rb'