Do not generate local vars for partials without object or collection

Previously rendering a partial without giving :object or :collection
would generate a local variable with the partial name by default.

This was noticed due to warnings in Ruby 2.0 of not used variables,
which turned out to be the generation of not used variables inside
partials that do not contain objects related to them.

1 files changed, 7 insertions, 0 deletions

diff --git a/actionpack/test/template/render_test.rb b/actionpack/test/template/render_test.rb
index 9fb26e32b1..8111e58527 100644
--- a/actionpack/test/template/render_test.rb
+++ b/actionpack/test/template/render_test.rb
@@ -318,6 +318,13 @@ module RenderTestCases
       @controller_view.render(customers, :greeting => "Hello")
   end
 
+  def test_render_partial_without_object_or_collection_does_not_generate_partial_name_local_variable
+    exception = assert_raises ActionView::Template::Error do
+      @controller_view.render("partial_name_local_variable")
+    end
+    assert_match "undefined local variable or method `partial_name_local_variable'", exception.message
+  end
+
   # TODO: The reason for this test is unclear, improve documentation
   def test_render_partial_and_fallback_to_layout
     assert_equal "Before (Josh)\n\nAfter", @view.render(:partial => "test/layout_for_partial", :locals => { :name => "Josh" })