Store and retrieve attachment in Pouch DB using Angular/Ionic

Recently, I am exploring pouch db and how to cache a server document in PouchDB in ionic. The topic was addressed in bits and pieces across posts and forums. Below is the code sample which brings everything together. 

	$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);
	});

view raw pouchattachment.js hosted with ❤ by GitHub