render_partial_to_object

# File actionview/lib/action_view/renderer/renderer.rb, line 64
    def render_partial_to_object(context, options, &block) #:nodoc:
      partial = options[:partial]
      if String === partial
        collection = collection_from_options(options)

        if collection
          # Collection + Partial
          renderer = CollectionRenderer.new(@lookup_context, options)
          renderer.render_collection_with_partial(collection, partial, context, block)
        else
          if options.key?(:object)
            # Object + Partial
            renderer = ObjectRenderer.new(@lookup_context, options)
            renderer.render_object_with_partial(options[:object], partial, context, block)
          else
            # Partial
            renderer = PartialRenderer.new(@lookup_context, options)
            renderer.render(partial, context, block)
          end
        end
      else
        collection = collection_from_object(partial) || collection_from_options(options)

        if collection
          # Collection + Derived Partial
          renderer = CollectionRenderer.new(@lookup_context, options)
          renderer.render_collection_derive_partial(collection, context, block)
        else
          # Object + Derived Partial
          renderer = ObjectRenderer.new(@lookup_context, options)
          renderer.render_object_derive_partial(partial, context, block)
        end
      end
    end