错误JS：位置0的JSON中出现意外的令牌d

Question

我在后端使用Symfony（我在数据库中返回数据invoque时创建控制器）..现在使用Ajax我在控制器中有invoqu数据返回但是我有这个错误：

[![enter image description here][1]][1]

代码控制器：

<?php

        namespace Tag\TagBundle\Controller;

        use Symfony\Bundle\FrameworkBundle\Controller\Controller;
        use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
        use Symfony\Component\HttpFoundation\Request;
        use Symfony\Component\HttpFoundation\JsonResponse;
        class TagController extends Controller
        {

            /**
             *@ param Request $request
             */
            public function indexAction(Request $request) {
                $em = $this->getDoctrine()->getManager();
                $rep = $em->getRepository('TagBundle:Tag')->findAll();
                    return $this->json($rep,200,[],['groups' => ['public']]);
            }
        }

代码JS：

    $( function() {
       $.ajax({
           url:Routing.generate('tags'),
           type:'post',
           cache:false,
           success: function(data,response){
            var data = JSON.parse('data'); 
            console.log(data);
               $( ".bootstrap-tagsinput > input" ).autocomplete({
        source: data
      });

          }
       });

    } );