JSON stringify circular structure error

Question

In the below code, for each staff member I am trying to grab a list of the group_ids of groups they supervise and then I want to stringify the array containing those ids and send it off to update the database.

However, when I try to stringify the mapped array, I get an error about converting a circular structure. I don't quite see what is circular in the below code.

Any help is much appreciated.

$(".staff_member").each(function() {
        var staff_id = $(this).attr("staff_id");

        var newarr = $(this).find(".staff_groups .staff_group").map(function() {
            return $(this).attr("group_id");
        });
        alert(JSON.stringify(newarr));
        $.post(
            "staff_update.php",
            { staff_id: staff_id, groups: newarr },
            function(data) {
                var response = jQuery.parseJSON(data);
                if(response.code == "success") {
                    alert("Done!");
                } else if(response.code == "failure") {
                    alert("Failure!");
                }
            }
        );
    });

Did you really mean to comment out that block of code in the middle? — Robert Harvey
– Robert Harvey, Commented Dec 3, 2012 at 20:17
Log in the console the content of newarr before stringify, maybe with this you see the circular reference. — user800014
– user800014, Commented Dec 3, 2012 at 20:18
Sorry, that wasn't the problem I was having, but I updated the code — Jon Rubins
– Jon Rubins, Commented Dec 3, 2012 at 20:18
Can you post a screenshot of the expanded object from calling console.log(newarr) — Ruan Mendes
– Ruan Mendes, Commented Dec 3, 2012 at 20:19

Sushanth -- · Accepted Answer · 2012-12-03 20:19:44Z

3

Convert that to an array first .. .map() returns a jQuery Object

var newarr = $(this).find(".staff_groups .staff_group").map(function() {
            return $(this).attr("group_id");
        }).get() ;

answered Dec 3, 2012 at 20:19

Sushanth --

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1 Comment

Sushanth -- Over a year ago

@jrubins .. Glad to have helped :)

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