What is the process of implementing a service in AngularJS?

For my Angular JS project, I am working on creating a module to include my service (file: utils/productos.js) and then load it as a dependency for my ventas module (ventas/ventas.js). However, I encountered the following error:

Error: [$injector:nomod] Module 'utils.producto' is not available! You either misspelled the module name or forgot to load it. If registering a module ensure that you specify the dependencies as the second argument.
http://errors.angularjs.org/1.3.10/$injector/nomod?p0=utils.producto angular.js:63:11
Error: [$injector:modulerr] Failed to instantiate module webui due to:
[$injector:modulerr] Failed to instantiate module utils.producto due to:
[$injector:nomod] Module 'utils.producto' is not available! You either misspelled the module name or forgot to load it. If registering a module ensure that you specify the dependencies as the second argument.
http://errors.angularjs.org/1.3.10/$injector/nomod?p0=utils.producto
minErr/<@http://localhost/cat-dog/web/app/js/angular.js:63:12
module/<@http://localhost/cat-dog/web/app/js/angular.js:1764:1
ensure@http://localhost/cat-dog/web/app/js/angular.js:1688:38
module@http://localhost/cat-dog/web/app/js/angular.js:1762:1
loadModules/<@http://localhost/cat-dog/web/app/js/angular.js:4094:22
forEach@http://localhost/cat-dog/web/app/js/angular.js:323:11
loadModules@http://localhost/cat-dog/web/app/js/angular.js:4078:5
loadModules/<@http://localhost/cat-dog/web/app/js/angular.js:4095:40
forEach@http://localhost/cat-dog/web/app/js/angular.js:323:11
lo

app.js

var app = angular.module('webui', ['ngRoute', 'utils.producto', 'ventas']);

main.html

<script type="text/javascript" src="ventas/ventas.js"></script>
<script type="text/javascript" src="js/app.js"></script>
<script type="text/javascript" src="utils/productos.js"></script>

ventas/ventas.js

angular.module('ventas', ['ngRoute', 'utils.producto'])

        .config(['$routeProvider', function ($routeProvider) {
                $routeProvider.when('/ventas', {
                    templateUrl: 'ventas/ventas.html',
                    controller: 'VentasCtrl'
                });
            }])

utils/producto.js

    angular.module('utils.producto').factory("buscadorProductos", buscadorProductos).factory("autocompProductos", autocompProductos);

    function buscadorProductos($http) {
..
javascriptangularjsdependency-injectionangularjs-factory

Answer №1

Start by defining the service as a module, for example: 

angular.module('utils.producto',[])

Implementation

 angular.module('utils.producto', []).factory("searchProducts", searchProducts).factory("autocompleteProducts", autocompleteProducts);

    function searchProducts($http) {

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