Getting data from an ajax call in an Angular JS application with a 3-tier structure

I am managing two services - one to make an ajax call and the other to process the data received from the call. However, I am facing an issue with updating the data before returning it to the controller. Below is the code snippet:

 angular.module("Data", []).service("DataService", function ($http) {

     
        return {
            Data:  
               function (url, callback) {
                    $http.get(url).success(callback);     

            },
        }
    })

    angular.module("Home", ["Data"]).service("HomeService", function (DataService) {
      
        return 
        {  
            Dataw3:    
                DataService.Data('http://www.w3schools.com/angular/customers.php', function (results) {
                    return results.records
                });
            
     
        }
          

    })


    angular.module("Home").controller("HomeCntrl", function ($scope, HomeService) {
                 
            console.log(DataService.Dataw3)  
    
    })

Answer №1

Initially, you are utilizing the factory syntax along with a service declaration.

angular.module("Data", []).factory("DataService", function ($http) {

angular.module("Home", ["Data"]).factory("HomeService", function (DataService) {

This approach should likely resolve the issue at hand.

Next, you are attempting to return a value from a callback, which is ineffective. Dataw3 should be a function that takes a callback as an argument, within which you can place your console.log :

angular.module("Data", []).factory("DataService", function ($http) {   
    return {
        Data:  
           function (url, callback) {
                $http.get(url).success(callback);     
           }
    };
});

angular.module("Home", ["Data"]).factory("HomeService", function (DataService) {
    return {
        Dataw3:
            function(callback){
                DataService.Data('http://www.w3schools.com/angular/customers.php', function (results) {
                    callback(results);
                });
            }
    };
});

angular.module("Home").controller("HomeCntrl", function ($scope, HomeService) {          
    HomeService.Dataw3(function(result){
        console.log(result);
    });
});

I advise delving deeper into the distinctions between service and factory in angular, as well as exploring asynchronous calls in javascript, to enhance your comprehension of the operations you are performing.

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