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TheObject = {
getArray: function(){
var groups = new Array;
$.ajax({
type: "POST",
url: "link.php",
success: function (data){
var counter = 0;
$('g',data).each(function(){
var group_name = $(this).find("name").text();
var group_id = $(this).find("id").text();
var group = {
id: group_id,
name: group_name
}
groups[counter] = group;
counter++;
});
return groups;
}
});
}
}
And when I try to call this method:
var a = TheObject.getArray();
alert(a);
It returns 'undefined'. I cant figure out where is the problem. The array gets created inside the success function but I'am unable to return it properly. Thanks for your help!
504
You can store your promise, you can pass it around, you can use it as an argument in function calls and you can return it from functions, but when you finally want to use your data that is returned by the AJAX call, you have to do it like this: promise. success(function (data) { alert(data); });
In most cases, you will need to specify the success and error callbacks. The success callback will be called after the successful completion of the AJAX call. The response returned by the server will be passed along to the success callback.
AJAX success is a global event. Global events are triggered on the document to call any handlers who may be listening. The ajaxSuccess event is only called if the request is successful. It is essentially a type function that's called when a request proceeds.
In your code, you are looking for groups using procedural coding after the ajax call was made. The main problem is that you are looking for groups before the ajax call is complete.
Another problem is that you are returning groups to the success() function, but the TheObject.getArray() function returns nothing.
So you need to bring in the callback into the ajax function like this:
TheObject = {
getArray: function(callback) {
var groups = new Array;
$.ajax({
type: "POST",
url: "link.php",
success: function (data){
var counter = 0;
$('g',data).each(function(){
var group_name = $(this).find("name").text();
var group_id = $(this).find("id").text();
var group = {
id: group_id,
name: group_name
}
groups[counter] = group;
counter++;
});
callback.call(this,groups);
}
});
}
}
TheObject.getArray(function(a) {
// this code runs when the ajax call is complete
alert(a);
});
A very simple version of David's example.
TheObject = {
getArray: function(callback) {
$.ajax({
cache: true,
type: "GET",
url: "http://www.domain.com/core/domains.php",
success: function (data){
callback.call(this,data);
}
});
}
}
TheObject.getArray(function(data) {
javascript: console.log(data);
});
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