PouchDB with SQLite plugin in Ionic Framework (Pre-populated database) => Using service pattern

docsController.js

controllers.controller('DocsController', ['$scope', '$ionicPlatform', 'Docs', 'Products' function ($scope, $ionicPlatform, Docs, Products) {
    
    $scope.products = [];
    $scope.allDocs = [];
    
    $ionicPlatform.ready(function () {
        
        //Insert a new product
        Products.addProduct({
            name : 'Milk',
            price : 2000
        }).then(function () {
            //Get Products
            return Products.getProducts();
        }).then(function (products) {
            $scope.products = products.rows;
            //Get All Docs
            return Docs.getDocs();
        }).then(function (docs) {
            $scope.allDocs = docs.rows;
            alert("Total Docs: " + docs.total_rows);
        }).catch(function (err) {
            console.log(err);
        });
    });
} ]);

docsService.js

services.factory('Docs', function ($q, pouchService) {

    return {
        getDocs: function () {
            return $q.when(pouchService.db().allDocs({ include_docs: true }));
        }
    };
});

pouchService.js

services.service('pouchService', function () {
    var _db;

    this.db = function () {
        if (!_db) {
            _db = new PouchDB('demoDB', { adapter: 'websql', createFromLocation: 1, androidDatabaseImplementation: 2 });
            if (!_db.adapter) {
                console.log("SQLite no fue soportado por PouchDB");
                _db = new PouchDB('demoDB');
            }
            _db.info().then(console.log.bind(console)); //return sqlite_plugin: true
        }
        return _db;
    };
});

productsService.js

services.factory('Products', function ($q, pouchService) {

    var type = 'product';

    return {
        getProducts: function () {
            return $q.when(pouchService.db().query(productMapFunction, { include_docs: true }));
        },
        addProduct: function (product) {
            product.type = type;
            return $q.when(pouchService.db().post(product));
        }
    };

    function productMapFunction(doc, emit) {
        if (doc.type === type) {
            emit(doc);
        }
    };
});