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So, I saw an example where they were passing an angualar deferred into ngRepeat and it worked fine. For some reason when I set up this example it doesn't work. Can anyone tell me why? If you assign the data without the deferred it works fine i.e. $scope.objects = [{id:1}...]
Many thanks
Fiddle here
<!doctype html>
<html ng-app="app">
<head>
</head>
<body>
<testlist/>
<script src="/lib/angular/angular.js"></script>
<script>
var app = angular.module('app', []);
app.factory('dataService', function ($q) {
return {
getData : function () {
var deferred = $q.defer();
setTimeout(function () {
deferred.resolve([{id:1},{id:2},{id:3},{id:4}]);
},0);
return deferred.promise;
}
};
});
app.directive('testlist', ['dataService', function(dataService) {
return {
restrict: 'E',
replace: true,
scope : {},
template: '<div ng-repeat="data in objects">{{inspect(data)}}{{data.id}}</div>',
controller: function($scope) {
$scope.objects = [{id:1},{id:2},{id:3},{id:4}];
$scope.inspect = function (obj) {
console.log(obj)
}
}
}
}]);
</script>
</body>
</html>
589
Example of a Promise // We create our promise $http. get('api/status') // that once complete will call either our success callback function // or our error callback function . then(function success(response) { // handle our response object $log. log(response); }, function error(response) { // handle our error $log.
$q. defer() allows you to create a promise object which you might want to return to the function that called your login function.
$q is integrated with the $rootScope. Scope Scope model observation mechanism in AngularJS, which means faster propagation of resolution or rejection into your models and avoiding unnecessary browser repaints, which would result in flickering UI. Q has many more features than $q, but that comes at a cost of bytes.
I don't think you can use the promise objects directly, you should use the then callbacks as stated in the documentation.
This means that your
$scope.objects = dataService.getData();
Should instead be something like
dataService.getData().then(function(data) {
$scope.objects = data;
});
Otherwise, your $scope.objects will contain the promise object, and not the data you are passing to resolve.
See the updated fiddle here.
61
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