1 files changed, 36 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/renderable_partial.rb b/actionpack/lib/action_view/renderable_partial.rb
new file mode 100644
index 0000000000..fdb1a5e6a7
--- /dev/null
+++ b/actionpack/lib/action_view/renderable_partial.rb
@@ -0,0 +1,36 @@
+module ActionView
+  module RenderablePartial
+    # NOTE: The template that this mixin is beening include into is frozen
+    # So you can not set or modify any instance variables
+
+    include ActiveSupport::Memoizable
+
+    def variable_name
+      name.sub(/\A_/, '').to_sym
+    end
+    memoize :variable_name
+
+    def counter_name
+      "#{variable_name}_counter".to_sym
+    end
+    memoize :counter_name
+
+    def render(view, local_assigns = {})
+      ActionController::Base.benchmark("Rendered #{path_without_format_and_extension}", Logger::DEBUG, false) do
+        super
+      end
+    end
+
+    def render_partial(view, object = nil, local_assigns = {}, as = nil)
+      object ||= local_assigns[:object] ||
+        local_assigns[variable_name] ||
+        view.controller.instance_variable_get("@#{variable_name}") if view.respond_to?(:controller)
+
+      # Ensure correct object is reassigned to other accessors
+      local_assigns[:object] = local_assigns[variable_name] = object
+      local_assigns[as] = object if as
+
+      render_template(view, local_assigns)
+    end
+  end
+end