Utilizing AngularJS for handling HTTP responses

Question

Utilizing AngularJS for handling HTTP responses

Hello, I am currently in the process of familiarizing myself with AngularJS for the second time. I have successfully created an http request without any issues. However, my question pertains to how I can retrieve the result of this request and store it in a variable?

var cust_url = "RETURN A JSON";    
var FINAL_FILE = "";

$http.get(cust_url)
    .then(function (response) {    
        $scope.details = response.data;   
        //--> do multiple modifications to response.data      
        FINAL_FILE = 'something';
    }); 

$scope.data = {   
    /*USE HERE --> FINAL_FILE       
    // returns 'undefined' on the console if I try to access FINAL_FILE
    */
};

Apologies for my oversight, I realize this might seem like a trivial mistake. Thank you for your assistance.

javascript angularjs vis.js

Answer 1

Answer №1

$http requests are asynchronous, which is why you receive an undefined value. To access the response data, it must be done inside the then callback, where the data becomes available. Here's an example:

$http.get(cust_url)
    .then(function (response) {

        $scope.details = response.data;

        //--> perform multiple modifications to response.data  

        FINAL_FILE = 'something';

        // Use $scope.details here or call a function to utilize the data

        $scope.data = { };

});

Answer 2

$http requests are asynchronous, which is why you receive an undefined value. To access the response data, it must be done inside the then callback, where the data becomes available. Here's an example:

$http.get(cust_url)
    .then(function (response) {

        $scope.details = response.data;

        //--> perform multiple modifications to response.data  

        FINAL_FILE = 'something';

        // Use $scope.details here or call a function to utilize the data

        $scope.data = { };

});

Answer 3

Answer №2

Retrieve information using the .then method and store the promise:

var finalFilePromise = $http.get(cust_url)
.then(function (response) {    
    $scope.details = response.data;   
    //--> make various modifications to response.data      
    FINAL_FILE = 'something';
    return FINAL_FILE;
});

To access the data, extract it from the promise:

$scope.data = {   
    //USE HERE --> FINAL_FILE       
    finalFilePromise.then(function(FINAL_FILE) {
        console.log(FINAL_FILE);
    });        
};

For additional details, please refer to

AngularJS $q Service API Reference - Chaining Promises

Answer 4

Retrieve information using the .then method and store the promise:

var finalFilePromise = $http.get(cust_url)
.then(function (response) {    
    $scope.details = response.data;   
    //--> make various modifications to response.data      
    FINAL_FILE = 'something';
    return FINAL_FILE;
});

To access the data, extract it from the promise:

$scope.data = {   
    //USE HERE --> FINAL_FILE       
    finalFilePromise.then(function(FINAL_FILE) {
        console.log(FINAL_FILE);
    });        
};

For additional details, please refer to

AngularJS $q Service API Reference - Chaining Promises

Utilizing AngularJS for handling HTTP responses

Answer №1

Answer №2

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