$stateProvider.state('myState', {
resolve:{
// Example using function with simple return value.
// Since it's not a promise, it resolves immediately.
simpleObj: function(){
return {value: 'simple!'};
},
// Example using function with returned promise.
// This is the typical use case of resolve.
// You need to inject any services that you are
// using, e.g. $http in this example
promiseObj: function($http){
// $http returns a promise for the url data
return $http({method: 'GET', url: '/someUrl'});
},
// Another promise example. If you need to do some
// processing of the result, use .then, and your
// promise is chained in for free. This is another
// typical use case of resolve.
promiseObj2: function($http){
return $http({method: 'GET', url: '/someUrl'})
.then (function (data) {
return doSomeStuffFirst(data);
});
},
// Example using a service by name as string.
// This would look for a 'translations' service
// within the module and return it.
// Note: The service could return a promise and
// it would work just like the example above
translations: "translations",
// Example showing injection of service into
// resolve function. Service then returns a
// promise. Tip: Inject $stateParams to get
// access to url parameters.
translations2: function(translations, $stateParams){
// Assume that getLang is a service method
// that uses $http to fetch some translations.
// Also assume our url was "/:lang/home".
return translations.getLang($stateParams.lang);
},
// Example showing returning of custom made promise
greeting: function($q, $timeout){
var deferred = $q.defer();
$timeout(function() {
deferred.resolve('Hello!');
}, 1000);
return deferred.promise;
}
},
// The controller waits for every one of the above items to be
// completely resolved before instantiation. For example, the
// controller will not instantiate until promiseObj's promise has
// been resolved. Then those objects are injected into the controller
// and available for use.
controller: function($scope, simpleObj, promiseObj, promiseObj2, translations, translations2, greeting){
$scope.simple = simpleObj.value;
// You can be sure that promiseObj is ready to use!
$scope.items = promiseObj.data.items;
$scope.items = promiseObj2.items;
$scope.title = translations.getLang("english").title;
$scope.title = translations2.title;
$scope.greeting = greeting;
}
})
