Store and retrieve attachment in Pouch DB using Angular/Ionic

pouchattachment.js

$scope.storeFile = function () {
  //Use Sqllite
            var db = new PouchDB('mydb.db', {
                adapter: 'cordova-sqlite'
            });
  //Create index - pouchdb-find plugin
            db.createIndex({
                index: {
                    fields: ['name'],
                    name: 'nameidx'
                }
            }).then(function (result) {
                console.log(result);
            }).catch(function (err) {
                console.log(err);
            });
 //Insert mittens
            var doc = {
                "_id": "mittens",
                "name": "Mittens",
                "occupation": "kitten",
                "age": 3,
                "hobbies": [
            "playing with balls of yarn",
            "chasing laser pointers",
            "lookin' hella cute"
            ]
            };
            db.put(doc);
//insert mittens1
            var doc = {
                "_id": "mittens1",
                "name": "Mittens",
                "occupation": "kitten",
                "age": 3,
                "hobbies": [
            "playing with balls of yarn",
            "chasing laser pointers",
            "lookin' hella cute"
            ]
            };
            db.put(doc);


//sample get operation
            db.get('mittens').then(function (doc) {
                //console.log(doc);
            });

            var config = {
                headers: {
                    'Referer': 'https://xxx.xxx.com'

                },
              //this is really important 
                responseType: 'blob'
            };
            var myUrl;
  //get image blob from server
            $http.get("https://xxx.xxx.com/xxxx.xxx.com/xxxxxx/BSC/CC.jpg", config).success(function (res) {
                console.log('blob');
                //console.log(res);
              //insert blob as mydoc1. attachemnt object will not be indexed by pouchdb-find
                db.put({
                    _id: 'mydoc1',
                    name: 'Mittens',
                    _attachments: {
                        'CC.jpg': {
                            content_type: 'image/jpeg',
                            data: res
                        }
                    }
                });
      //insert mydoc2
                var doc = {
                    "_id": "mydoc2",
                    "name": "Mittens",
                    "occupation": "kitten",
                    "age": 3,
                    "hobbies": [
            "playing with balls of yarn",
            "chasing laser pointers",
            "lookin' hella cute"
            ]
                };
                db.put(doc);
//insert mydoc3
                var doc = {
                    "_id": "mydoc3",
                    "name": "Mittens"
                };
                db.put(doc);

                db.getAttachment('mydoc1', 'CC.jpg').then(function (blob) {
                    //console.log(blob);
                    myUrl = URL.createObjectURL(blob);
                    $scope.myUrl = myUrl;
                });
//issue search
                db.find({
                    selector: {
                        name: 'Mittens'
                    },
                    fields: ['_id', 'name'],
                    sort: ['name']
                }).then(function (result) {
                    console.log('idx');
                  //returns all objects with Mittens except attachments
                    console.log(result);
                }).catch(function (err) {
                    console.log(err);
                });
            }).error(function (err) {
                console.log(err);
            });