Array of objects not getting parsed as javascript array of native objects?

Question

I am receiving following data from server

"[{\"role_id\":\"1\",\"name\":\"administrator\",\"created_by_user_id\":\"2\",\"time_created_on\":null,\"is_user_based\":\"0\"},{\"role_id\":\"2\",\"name\":\"manager\",\"created_by_user_id\":null,\"time_created_on\":null,\"is_user_based\":\"0\"}]"

which is simply an array of two objects . Even after setting 'dataType' to json I am not receiving native javascript array inside my success callback function but if I use

$.ajaxSetup({
        url:'/public/admin/role/list',
        dataType:'json'

    });


$.ajax({
    success:function(data) {
    alert(data[0].name); // alert box pop up as 'undefined ' 
    var data = $.parseJSON(data); 
    alert(data[0].name) ; //works 
    }
    });

user113716 · Accepted Answer · 2011-07-03 14:32:16Z

2

Don't escape the ". They're required for JSON parsing.

[{"role_id":"1","name":"administrator","created_by_user_id":"2","time_created_on":null,"is_user_based":"0"},{"role_id":"2","name":"manager","created_by_user_id":null,"time_created_on":null,"is_user_based":"0"}]

answered Jul 3, 2011 at 14:32

user113716

323k64 gold badges454 silver badges441 bronze badges

@jason: What version of jQuery are you using?

user113716
– user113716

07/03/2011 14:42:22
Commented Jul 3, 2011 at 14:42
@jason - the outer quotes make it a string and strings do need inner quotes "quoted". Using parseJSON on the resulting string unpacks the string into an object. You just need to return the object itself. I suspect on the server-side you're double-quoting the quotes \\" and starting the string with "\"[.... Drop the opening/closing quotes and don't double quote on the server and you'll be ok.

tvanfosson
– tvanfosson

07/03/2011 15:04:11
Commented Jul 3, 2011 at 15:04
@tvanfosson: You should post your answer. I think you're right. OP is encoding it twice server side. I get the same result in the console with JSON.stringify( JSON.stringify( [{"role_id":"1",...}] ) );

user113716
– user113716

07/03/2011 15:21:34
Commented Jul 3, 2011 at 15:21

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Darin Dimitrov · Accepted Answer · 2011-07-03 14:31:32Z

0

You have a trailing comma when setting dataType in your ajaxSetup method:

dataType:'json',
               ^

Also I hope those \ in the JSON you have shown here are not part of the actual response from the server. The response should look like this:

[{"role_id":"1","name":"administrator","created_by_user_id":"2","time_created_on":null,"is_user_based":"0"},{"role_id":"2","name":"manager","created_by_user_id":null,"time_created_on":null,"is_user_based":"0"}]

answered Jul 3, 2011 at 14:31

Darin Dimitrov

1.0m275 gold badges3.3k silver badges2.9k bronze badges

thanks for pointing that out but it was a mistake during copy and paste.

Mr Coder
– Mr Coder

07/03/2011 14:36:51
Commented Jul 3, 2011 at 14:36
@jason bournem so the server sends the JSON as shown in my answer? If this is the case it should work without the need to call any $.parseJSON. Also ensure that there are no surrounding ".

Darin Dimitrov
– Darin Dimitrov

07/03/2011 14:41:39
Commented Jul 3, 2011 at 14:41

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