gistfile1.txt

        $this->source = $this->getServiceLocator()->get('notifications');        

        $group['keys'] = array('type' => 1);
        $group['initial'] = array('notifications' => array());
        $group['reduce'] = $reduce = "function (obj, prev) { prev.items.push(obj.name); }";
        $query = $this->source->group($group['keys'], $group['initial'], $group['reduce'])->query()->sort('title');