Adds :layout option to render :partial when a collection is given.

actionpack/lib/action_view/renderer/partial_renderer.rb

@@ -238,7 +238,14 @@ module ActionView
         spacer = find_template(@options[:spacer_template]).render(@view, @locals)
       end
 
+      if layout = @options[:layout]
+        layout = find_template(layout)
+      end
+
       result = @template ? collection_with_template : collection_without_template
+      
+      result.map!{|content| layout.render(@view, @locals) { content } } if layout
+      
       result.join(spacer).html_safe
     end
 
@@ -342,9 +349,10 @@ module ActionView
         locals[as] = object
         segments << template.render(@view, locals)
       end
-
+      
       segments
     end
+    
 
     def collection_without_template
       segments, locals, collection_data = [], @locals, @collection_data

actionpack/test/fixtures/test/_b_layout_for_partial.html.erb

@@ -0,0 +1 @@
+<b><%= yield %></b>

actionpack/test/template/render_test.rb

@@ -238,6 +238,10 @@ module RenderTestCases
   def test_render_partial_with_nil_values_in_collection
     assert_equal "Hello: davidHello: Anonymous", @view.render(:partial => "test/customer", :collection => [ Customer.new("david"), nil ])
   end
+  
+  def test_render_partial_with_layout_using_collection_and_template
+    assert_equal "<b>Hello: Amazon</b><b>Hello: Yahoo</b>", @view.render(:partial => "test/customer", :layout => 'test/b_layout_for_partial', :collection => [ Customer.new("Amazon"), Customer.new("Yahoo") ])
+  end
 
   def test_render_partial_with_empty_array_should_return_nil
     assert_nil @view.render(:partial => [])