Jquery code to check an element is exist in json

Question

I want to check an element is exist in the json data for that am doing

 $.get('/geteststatus', getdata, function (data) {

          if (data != "" || data[0].status ) {

});

where getdata is unique id

am getting this error

TypeError: data[0] is undefined


if (data != "" || data[0].status) {}

json data contains only one row value.it does not contain multiple values.so i used data[0] checking

json data

{"id" : "12" , "status" : "GC", "_id" : ObjectId("52f3045873e7e96b18000005") }

what is the format of `data` if it is an object then try `data.status` instead of `data[0].status` — Arun P Johny, Feb 06 '14 at 04:15
possible duplicate of [How can I debug my JavaScript code?](http://stackoverflow.com/questions/988363/how-can-i-debug-my-javascript-code) — Ram, Feb 06 '14 at 04:16

score 1 · Answer 1 · answered Feb 06 '14 at 04:18

1

Since data is an object, you have to use

if(!data || data.status){
}

answered Feb 06 '14 at 04:18

Arun P Johny

score 0 · Answer 2 · answered Feb 06 '14 at 04:18

0

Usually good to add an escape clause--just exit if you don't get any data.

$.get('/geteststatus', getdata, function (data) {
  if (!data or data.length === 0) { return; }
  // process data
});

answered Feb 06 '14 at 04:18

SimplGy

score 0 · Answer 3 · answered Feb 06 '14 at 04:23

0

you can also use typeof operator:

e.g.

if(typeof data.status != "undefined") {
   //do something
}

answered Feb 06 '14 at 04:23

Dharmang

3 Answers3