render_partial

# File actionpack/lib/action_view/partials.rb, line 176
      def render_partial(options = {}) #:nodoc:
        local_assigns = options[:locals] || {}

        case partial_path = options[:partial]
        when String, Symbol, NilClass
          if options.has_key?(:collection)
            render_partial_collection(options)
          else
            _pick_partial_template(partial_path).render_partial(self, options[:object], local_assigns)
          end
        when ActionView::Helpers::FormBuilder
          builder_partial_path = partial_path.class.to_s.demodulize.underscore.sub(/_builder$/, '')
          local_assigns.merge!(builder_partial_path.to_sym => partial_path)
          render_partial(:partial => builder_partial_path, :object => options[:object], :locals => local_assigns)
        else
          if Array === partial_path ||
            (defined?(ActiveRecord) &&
             (ActiveRecord::Associations::AssociationCollection === partial_path ||
              ActiveRecord::NamedScope::Scope === partial_path))
            render_partial_collection(options.except(:partial).merge(:collection => partial_path))
          else
            object = partial_path
            render_partial(
              :partial => ActionController::RecordIdentifier.partial_path(object, controller.class.controller_path),
              :object => object,
              :locals => local_assigns
            )
          end
        end
      end