jQuery 1.4.4+ AJAX request - post empty array or object becomes string

Question

I have a object in Javascript that I am trying to AJAX POST to a PHP script. Everything worked in jQuery 1.4.1 but now in 1.4.4 or above all empty arrays or empty objects ar

Answer 1

Try setting the traditional option to true:

$.ajax({
    type: 'POST',
    traditional: true,
    url: 'ajax.php',
    data: obj,
    success: function(data) {
        alert(data);
    }
});

Have a look at the data and traditional options of the newer API.

And remove the extra comma from after the success callback if you want things to work in IE7.

Answer 2

try applying JSON.stringify to the parameters passed

 data: JSON.stringify ( obj ),

Note you'll likely want to include the contentType: "application/json" option to prompt server side to process the data correctly.

quoting : Why jQuery ajax does not serialize my object?

traditional: true is completely wrong, since it can never handle object hierarchies. What you get instead is: ...&key=[object Object], which is javascript's toString() default result for all objects.