我的一个AngularJS控制器包含以下行：
api.tickets.query()
api模块包含：
angular.module('myapp.api',[
'ngResource'
])
.factory('api',function($resource,applicationsService) {
function fetchAppId() {
return applicationsService.getCurrentApp();
}
return {
tickets: $resource('tickets',{
applicationId: fetchAppId
}),...
}
applicationsService.getCurrentApp()自己进行$http调用.所以你也许可以看到问题 – 这个调用可能在fetchAppId()返回时没有得到解决.
我怎么能绕过这个？
让我们说通过异步方式从applicationsService返回的数据是：
var data = [
{
"PreAlertInventory": "5.000000","SharesInInventory": "3.000000","TotalSharesSold": "2.000000"
}
和applicationsService工厂返回承诺：
.factory('applicationsService',['$resource','$q',$q) {
var data = [
{
"PreAlertInventory": "5.000000","TotalSharesSold": "2.000000"
}
];
var factory = {
getCurrentApp: function () {
var deferred = $q.defer();
deferred.resolve(data);
return deferred.promise;
}
}
return factory;
}]);
我会打电话给api.tickets()
$scope.data = api.tickets();
但是我们的api服务看起来像：
.factory('api',applicationsService,$q,$timeout) {
function fetchAppId() {
return applicationsService.getCurrentApp();
}
return {
tickets: function() {
var deferred=$q.defer();
fetchAppId().then(function(data) { // promise callback
$timeout(function(){ // added dummy timeout to simulate delay
deferred.resolve(data);
},3000);
});
return deferred.promise;
}
}
});
演示Fiddle
