Json Loop Jquery each doesn't work "undefined"

Question

I've got a problem with those data,

my json array data contains:

{"list_file":["{\"id\":\"511\",\"name\":\"Jellyfish.jpg\",\"projectId\":\"12539\",\"projectName\":\"project namessszd ddddzzde\",\"time\":\"1331843704\",\"size\":775702,\"timeRightFormat\":\"03\\\/15\\\/12 01:35:04 PM\",\"userFirstName\":\"Jerome\",\"userLastName\":\"Test\",\"userId\":\"8\"}","{\"id\":\"510\",\"name\":\"Hydrangeas.jpg\",\"projectId\":\"12539\",\"projectName\":\"project namessszd ddddzzde\",\"time\":\"1331843704\",\"size\":595284,\"timeRightFormat\":\"03\\\/15\\\/12 01:35:04 PM\",\"userFirstName\":\"Jerome\",\"userLastName\":\"Test\",\"userId\":\"8\"}","{\"id\":\"509\",\"name\":\"dudnzoizu ufoiuzio fueoifezuoiufifzeouofufzeoiuiofuz oife iofez.jpg\",\"projectId\":\"12539\",\"projectName\":\"project namessszd ddddzzde\",\"time\":\"1331843704\",\"size\":885242,\"timeRightFormat\":\"03\\\/15\\\/12 01:35:04 PM\",\"userFirstName\":\"Jerome\",\"userLastName\":\"Test\",\"userId\":\"8\"}"]}

when i loop through the elements like this

    $.each(data.list_file, function(i, file) {
        alert(file.id);
    });

I got undefined in the alert() box, but if i do just this instead

      $.each(data.list_file, function(i, file) {
        alert(file);
    });

I got the right json line.

Thank you

EDIT: with the entire array this time

because its simply treating it as a string and not as json? alert(typeof file); ? — mikevoermans
– mikevoermans, Commented Mar 15, 2012 at 20:45
Is that wrapped in a [], because what you have posted is not a valid JSON unless it is wrapped inside a []. If wrapped, then your function should work fine... jsfiddle.net/skram/F9Mrd — Selvakumar Arumugam
– Selvakumar Arumugam, Commented Mar 15, 2012 at 20:50
The json you just updated with also doesn't look valid. Can you give us the actual output you get from the json file when you visit it in a browser? — user400654
– user400654, Commented Mar 15, 2012 at 20:55
this is the one that i get from the browser and it's valid, i just tested it with jsonlint.com — Jerome Ansia
– Jerome Ansia, Commented Mar 15, 2012 at 20:57

Henrik Andersson · Accepted Answer · 2012-03-15 21:03:01Z

2

Enclose the JSON in [], it'll work then. What you have is a json list.

And check out this Tinker.io

If you parse the JSON you can then use the normal notation for accessing the objects properties.

Validate the json here!

Good luck!

edited Mar 15, 2012 at 21:03

answered Mar 15, 2012 at 20:46

Henrik Andersson

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1 Comment

Jerome Ansia Over a year ago

my json is valid, actually i posted the entire array in edit ;)

user400654 · Accepted Answer · 2012-03-15 20:57:31Z

1

I'm assuming you are making an ajax call. You need to specify the "json" datatype so that jquery will parse it as json.

$.ajax({
    url: url,
    dataType: "json",
    success: function (data) {
        // ...
    }
})

UPDATE:

Your json array is an array of json strings, try changing that to an array of objects:

{ "list_file": [ "{...}" ]}

should be

{ "list_file": [ {...} ]}

edited Mar 15, 2012 at 20:57

answered Mar 15, 2012 at 20:47

user400654

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1 Comment

Jerome Ansia Over a year ago

i'm pretty sure that's something like this ;)

Selvakumar Arumugam · Accepted Answer · 2012-03-15 21:02:03Z

1

What you have inside list_file is a string and not an Object. Actually, you have 3 strings.. each an object... Try using a function like below,

$.each(data['list_file'], function(i, file) {
    alert(JSON.parse(file).id);
});

answered Mar 15, 2012 at 21:02

Selvakumar Arumugam

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Comments

Royi Namir · Accepted Answer · 2012-03-15 20:45:20Z

0

this is not a valid json

you should wrap it with brackets !

you have many objects which must be in an Array.

Fix this first. later check.

answered Mar 15, 2012 at 20:45

Royi Namir

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3 Comments

Jerome Ansia Over a year ago

data is in brackets this is only a part of my json array

dwerner Over a year ago

Wait, it is an array, but should be in []

Royi Namir Over a year ago

@Jerome so upload all the Json

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