+module ActionView
+ # NOTE: The template that this mixin is being included into is frozen
+ # so you cannot set or modify any instance variables
+ module RenderablePartial #:nodoc:
+ extend 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 = {})
+ if defined? ActionController
+ ActionController::Base.benchmark("Rendered #{path_without_format_and_extension}", Logger::DEBUG, false) do
+ super
+ end
+ else
+ super
+ end
+ end
+
+ def render_partial(view, object = nil, local_assigns = {}, as = nil)
+ object ||= local_assigns[:object] ||
+ local_assigns[variable_name]
+
+ if view.respond_to?(:controller)
+ ivar = :"@#{variable_name}"
+ object ||=
+ if view.controller.instance_variable_defined?(ivar)
+ ActiveSupport::Deprecation::DeprecatedObjectProxy.new(
+ view.controller.instance_variable_get(ivar),
+ "#{ivar} will no longer be implicitly assigned to #{variable_name}")
+ end
+ end
+
+ # 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