# File lib/action_controller/base.rb, line 713
      def render(options = nil, deprecated_status = nil, &block) #:doc:
        raise DoubleRenderError, "Can only render or redirect once per action" if performed?

        if options.nil?
          return render_file(default_template_name, deprecated_status, true)
        else
          # Backwards compatibility
          unless options.is_a?(Hash)
            if options == :update
              options = { :update => true }
            else
              ActiveSupport::Deprecation.warn(
                "You called render('#{options}'), which is a deprecated API call. Instead you use " +
                "render :file => #{options}. Calling render with just a string will be removed from Rails 2.0.",
                caller
              )

              return render_file(options, deprecated_status, true)
            end
          end
        end

        if content_type = options[:content_type]
          response.content_type = content_type.to_s
        end

        if text = options[:text]
          render_text(text, options[:status])

        else
          if file = options[:file]
            render_file(file, options[:status], options[:use_full_path], options[:locals] || {})

          elsif template = options[:template]
            render_file(template, options[:status], true)

          elsif inline = options[:inline]
            render_template(inline, options[:status], options[:type], options[:locals] || {})

          elsif action_name = options[:action]
            ActiveSupport::Deprecation.silence do
              render_action(action_name, options[:status], options[:layout])
            end

          elsif xml = options[:xml]
            render_xml(xml, options[:status])

          elsif json = options[:json]
            render_json(json, options[:callback], options[:status])

          elsif partial = options[:partial]
            partial = default_template_name if partial == true
            if collection = options[:collection]
              render_partial_collection(partial, collection, options[:spacer_template], options[:locals], options[:status])
            else
              render_partial(partial, ActionView::Base::ObjectWrapper.new(options[:object]), options[:locals], options[:status])
            end

          elsif options[:update]
            add_variables_to_assigns
            @template.send :evaluate_assigns

            generator = ActionView::Helpers::PrototypeHelper::JavaScriptGenerator.new(@template, &block)
            render_javascript(generator.to_s)

          elsif options[:nothing]
            # Safari doesn't pass the headers of the return if the response is zero length
            render_text(" ", options[:status])

          else
            render_file(default_template_name, options[:status], true)

          end
        end
      end