how can i test if elements are in json data

Question

I need to check if an element is in json data.

JSON data

{
    "status": {
        "carts": [
            {
                "service": "page-mailer",
                "running": "",
                "last success": "2015-05-07 09:35:31"
            }
        ],
        "pages": [
            {
                "service": "page-mailer",
                "running": "",
                "last success": "2015-05-07 09:35:31"
            }
        ],
        "actions": [
            {
                "service": "page-mailer",
                "running": "",
                "last success": "2015-05-07 09:35:31"
            }
        ],
        "integrations": [],
        "service": [
            {
                "service": "page-mailer",
                "running": "",
                "last success": "2015-05-07 09:35:31"
            }
        ],
        "smtp": [
            {
                "Server": "myserver"
            }
        ],
        "servers": []
    },
    "timing": "2ms"
}

Something like,

if(carts){}  
if(pages){} etc

i am using jquery getJSON();

Duplicate- http://stackoverflow.com/questions/4295386/how-can-i-check-if-a-value-is-a-json-object — ferr, May 11 '15 at 16:51
What else can it be ? This could also work: `if (typeof data == 'object') {}` — Jeanluca Scaljeri, May 11 '15 at 16:52
possible duplicate of [Check for child key/value pairs in JSON](http://stackoverflow.com/questions/7104061/check-for-child-key-value-pairs-in-json) — Barett, May 11 '15 at 17:11

dReAmEr · Accepted Answer · 2015-05-11T16:55:30.070

2

Below should work for you

if(data && data.status && data.status.carts){
   console.log("Exist")
}

edited May 11 '15 at 16:55

answered May 11 '15 at 16:52

dReAmEr

6,182
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He's using `$.getJSON`, so he doesn't need to call `JSON.parse()`, it's already parsed. – Barmar May 11 '15 at 16:54

score 1 · Answer 2 · answered May 11 '15 at 16:51

1

If you have:

var data = {"status": { "carts": ....... } }

Then to check if carts exists you write:

if( data && data.status && data.status.carts ) {
    //do something
}

answered May 11 '15 at 16:51

PeterKA

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Thank you, i believe my question didn't cover the part to find out if there are any records in carts or not. I want to execute if(data.status && data.status.carts){} only if it is not empty. would this condition work for that? – Shaonline May 11 '15 at 16:56
Yes, it would -- that's what it checks. – PeterKA May 11 '15 at 16:58
You need to check using `if(data && data.status && data.status.carts && data.status.carts.length)`. But if `data.status.carts` is always defined (even empty), you could just check for `if(data.status.carts.length)` – A. Wolff May 11 '15 at 17:03

how can i test if elements are in json data

2 Answers2