javascript - Angular Run Block - Use UI-Router $stateProvider to Resolve Promise

Question

UI-Router is different than Angular's ngRoute. It supports everything the normal ngRoute can do as well as many extra functions.

I am changing my Angular app from ngRoute to UI-Router. But I cannot quite figure out how to inject resolve function programmatically - the piece of code that I use outside Controller and config.

So, with standard Angular's ngRoute I can dynamically inject my resolve promise in the Angular run block:

app.run(function ($route) {
  var route = $route.routes['/'];
  route.resolve = route.resolve || {};
  route.resolve.getData = function(myService){return myService.getSomeData();};
});

Now how do I inject resolve promise in a similar way using UI-Router? I tried passing $stateProvider to get access to states but that was failing for me.

angular.module('uiRouterSample').run(
  [          '$rootScope', '$state', '$stateProvider'
    function ($rootScope,   $state, $stateProvider) {

      //$stateProvider would fail

Answer 1

You can use resolve to provide your controller with data before it loads the next state. To access the resolved objects, you will need to inject them into the controller as dependencies.

Let's use a shopping list application as an example. We'll start by defining our application module, and including ui.router as a dependency.:

angular.module('myApp', ['ui.router']);

We now want to define the module that will be specific to the shopping list page of our application. We'll define a shoppingList module, include the states for that module, a resolve for that state, and the controller.

Shopping List Module

angular.module('myApp.shoppingList').config(function ($stateProvider) {

    $stateProvider.state('app.shoppingList', {
        url: '/shopping-list',
        templateUrl: 'shopping-list.html',
        controller: 'ShoppingListController',
        resolve: {
            shoppingLists: function (ShoppingListService) {
                return ShoppingListService.getAll();
            }
        }
    });

});

We now can inject our resolved objects into our controller as dependencies. In the above state, I am resolving an object to the name shoppingLists. If I want to use this object in my controller, I include it as a dependency with the same name.

Shopping List Controller

angular.module('myApp.shoppingList').controller('ShoppingListController', function ($scope, shoppingLists) {
    $scope.shoppingLists = shoppingLists;
});

For additional details read the Angular-UI Wiki, which includes an in-depth guide to using resolve.