class ActionView::ObjectRenderer

def initialize(lookup_context, options)
  super
  @object     = nil
  @local_name = nil
end

def render_object_derive_partial(object, context, block)
  path = partial_path(object, context)
  render_object_with_partial(object, path, context, block)
end

def render_object_with_partial(object, partial, context, block)
  @object     = object
  @local_name = local_variable(partial)
  render(partial, context, block)
end

def render_partial_template(view, locals, template, layout, block)
  locals[@local_name || template.variable] = @object
  super(view, locals, template, layout, block)
end

def template_keys(path)
  super + [@local_name]
end