Ensure url_for(nil) falls back to url_for({}). [#472 state:resolved]

Signed-off-by: Pratik Naik <pratiknaik@gmail.com>

actionpack/lib/action_controller/base.rb

@@ -613,7 +613,8 @@ module ActionController #:nodoc:
       #
       # This takes the current URL as is and only exchanges the action. In contrast, <tt>url_for :action => 'print'</tt>
       # would have slashed-off the path components after the changed action.
-      def url_for(options = {}) #:doc:
+      def url_for(options = {})
+        options ||= {}
         case options
           when String
             options

actionpack/lib/action_view/helpers/url_helper.rb

@@ -63,17 +63,15 @@ module ActionView
       #   # calls @workshop.to_s
       #   # => /workshops/5
       def url_for(options = {})
+        options ||= {}
         case options
         when Hash
-          show_path =  options[:host].nil? ? true : false
-          options = { :only_path => show_path }.update(options.symbolize_keys)
+          options = { :only_path => options[:host].nil? }.update(options.symbolize_keys)
           escape  = options.key?(:escape) ? options.delete(:escape) : true
           url     = @controller.send(:url_for, options)
         when String
           escape = true
           url    = options
-        when NilClass
-          url = @controller.send(:url_for, nil)
         else
           escape = false
           url    = polymorphic_path(options)

actionpack/test/template/url_helper_test.rb

@@ -313,6 +313,10 @@ class UrlHelperWithControllerTest < ActionView::TestCase
       render :inline => "<%= show_named_route_#{params[:kind]} %>"
     end
 
+    def nil_url_for
+      render :inline => '<%= url_for(nil) %>'
+    end
+
     def rescue_action(e) raise e end
   end
 
@@ -329,7 +333,7 @@ class UrlHelperWithControllerTest < ActionView::TestCase
     assert_equal '/url_helper_with_controller/show_url_for', @response.body
   end
 
-  def test_named_route_shows_host_and_path
+  def test_named_route_url_shows_host_and_path
     with_url_helper_routing do
       get :show_named_route, :kind => 'url'
       assert_equal 'http://test.host/url_helper_with_controller/show_named_route', @response.body
@@ -343,6 +347,11 @@ class UrlHelperWithControllerTest < ActionView::TestCase
     end
   end
 
+  def test_url_for_nil_returns_current_path
+    get :nil_url_for
+    assert_equal '/url_helper_with_controller/nil_url_for', @response.body
+  end
+
   protected
     def with_url_helper_routing
       with_routing do |set|