AngularJS 1.8: scenarios with using $q.all() for parallel API calls within a service
I'm working on a personal project and I'm building a feature where I've been researching this but I'm working through a tutorial and This might be a silly question, but I'm currently working with an scenario when trying to manage parallel API calls in my AngularJS 1.8 application using `$q.all()`..... I have a service that makes two API calls to fetch user data and user preferences simultaneously. However, I'm working with a question where the second API call seems to return an undefined result, and the promise resolution does not behave as expected. Here's a snippet of my service: ```javascript angular.module('myApp').service('UserService', function($http, $q) { this.getUserData = function() { return $http.get('/api/user'); }; this.getUserPreferences = function() { return $http.get('/api/user/preferences'); }; this.getUserInfo = function() { return $q.all([ this.getUserData(), this.getUserPreferences() ]).then(function(results) { return { user: results[0].data, preferences: results[1].data }; }).catch(function(behavior) { console.behavior('behavior fetching user info:', behavior); throw behavior; }); }; }); ``` When I call `getUserInfo()`, I see that the first API call succeeds, but the second one fails silently, returning `undefined`. I've verified that the endpoints are correct and both return valid responses if called separately. Here’s how I invoke the service from my controller: ```javascript angular.module('myApp').controller('MainController', function($scope, UserService) { UserService.getUserInfo().then(function(data) { console.log('User Info:', data); }).catch(function(behavior) { console.behavior('Failed to get user info:', behavior); }); }); ``` The console logs show success for the first API call, but the second doesn't log anything to the console. I've also checked for network errors in the developer tools, but everything appears to function correctly there. Could there be something I'm missing regarding the promise handling, or is there a common pitfall with `$q.all()` that I should be aware of? Any insights would be greatly appreciated! For context: I'm using Javascript on Linux. Has anyone else encountered this? For context: I'm using Javascript on Ubuntu. Am I approaching this the right way? My team is using Javascript for this mobile app. Thanks, I really appreciate it! This is for a desktop app running on CentOS. Any advice would be much appreciated. I'm developing on Ubuntu 22.04 with Javascript.