Postman - Get response value using variable key

Question

I've created a GET request in Postman that returns some data in a JSON format. I want to get the JSON response value for every key that contains a specific substring.

This is the code I've been trying:

var jsonData = pm.response.json();
var keys = Object.keys(jsonData);

for(var i = 0; i < keys.length; i++) 
{
    if(keys[i].has("_number"))
    { 
       console.log(jsonData.keys[i]);
    }
}

Edit: The issue isn't with the substring recognition, but with the return of the values. If I try to get a value using a specific key in the condition (e.g. jsonData.Id) it works just fine. It just doesn't work when I'm trying to use a variable.

I don't know if it makes any difference but I'm using Runner to run the request. The response I'm getting is something like this ` { "Id": 12345, "name": "test", "date": "2020-05-20", "f1_number" : "1", "f2_number" : "2", "a1_number" : "1", "a2_number" : "2", . . . } ` — MADi, Apr 21 '20 at 12:14
Hi i have edited my answer, hope that will help you, issue is here `console.log(jsonData[keys[i]])` — Narendra Chouhan, Apr 21 '20 at 12:27

score 0 · Answer 1 · answered Apr 21 '20 at 11:40

0

has() is only searching for an exact key within a map. Try this for checking a substring:

if(keys[i].indexOf("_number") !== -1)
{ 
   console.log(jsonData.keys[i]);
}

or even the string function includes()

if(keys[i].includes("_number"))
{ 
   console.log(jsonData.keys[i]);
}

answered Apr 21 '20 at 11:40

Sebastian

11
2

The issue doesn't seem to be with the substring check. I tried your suggestions just to make sure but the values are still not returning. If I try to get a value using a specific key in the condition (e.g. jsonData.Id) it works just fine. It just doesn't work when I'm trying to use a variable. – MADi Apr 21 '20 at 11:56

Narendra Chouhan · Accepted Answer · 2020-04-21T12:26:57.903

0

You can check this way

var jsonData = pm.response.json();
var keys = Object.keys(jsonData);

for(var i = 0; i < keys.length; i++) 
{
    if(keys[i].includes('_number'))
    { 
       console.log(jsonData[keys[i]]);
    }
}

edited Apr 21 '20 at 12:26

answered Apr 21 '20 at 11:49

Narendra Chouhan

2,291
1
15
24

score 0 · Answer 3 · answered Apr 21 '20 at 13:44

0

Slightly different method but this would give the same output in the Postman Console:

_.each(Object.entries(jsonData), (item) => {
    if(item[0].includes('_number')) {
        console.log(item[1])
    }
})

answered Apr 21 '20 at 13:44

Danny Dainton

23,069
6
67
80

Postman - Get response value using variable key

3 Answers3