Postman - How can I pass array as variable

Question

Is there the possibility to use an array variable inside postman?

e.g. inside the body of a request:

{
    "myData" : {{arrayVariable}}
}

and inside the data file:

{
    "arrayVariable": ["1", "2", "3"]
}

I had a slightly related issue, of trying to pass a array from a pre request script via pm.variables.set. I solved it by doing `JSON.stringify` on the array, seems to work! — Karthik T, Nov 13 '20 at 17:08
Does this answer your question? [Postman: Can i save JSON objects to environment variable so as to chain it for another request?](https://stackoverflow.com/questions/41479494/postman-can-i-save-json-objects-to-environment-variable-so-as-to-chain-it-for-a) — Henke, Feb 19 '21 at 13:55

score 10 · Answer 1 · answered Jun 20 '20 at 10:36

10

It's possible, you can even add your own keys

answered Jun 20 '20 at 10:36

mpalencia

5,481
4
45
59

score 6 · Answer 2 · answered Nov 08 '18 at 12:05

6

using variable with a same name will give you an array

answered Nov 08 '18 at 12:05

WasiF

26,101
16
120
128

it' doesn't seems to work, it complains: "variable will be overwritten by a duplicate key"... – Mike D3ViD Tyson Jun 25 '21 at 11:56
1

@MikeD3ViDTyson It worked, may be they have updated the structure to create an array. If you find the way please let us know. – WasiF Jun 25 '21 at 12:21
1

The new way of storing is values separated by commas without brackets or quotes - value1,value2,value3 – marhyno Nov 29 '21 at 12:59

score 5 · Answer 3 · answered Apr 10 '18 at 17:28

5

You can create a JSON body like this:

{
    "myData" : [
        {{arrayVariable}}
    ]
}

And the variable like this:

arrayVariable: "1", "2", "3"

where arrayVariable is the key and "1", "2", "3" is the value.

answered Apr 10 '18 at 17:28

MickJaggerr

123
1
2
8

score 3 · Answer 4 · answered Nov 13 '16 at 17:30

Postman environment variables are meant to just save data as string, so here you are the workaround to pass array as environment variable/data file to Postman as a string like this:

{
    "arrayVariable": '["1", "2", "3"]'
}

Then, add the following piece of code to parse this variable in pre-request script in Postman like this:

var x = JSON.parse(postman.getEnvironmentVariable("arrayVariable"));
postman.setEnvironmentVariable("arrayVariable", x);

score 2 · Answer 5 · answered Jan 08 '18 at 10:46

2

Please create your body request like below

{
    "myData" : ["{{arrayVariable}}"]
}

and there is no change required for data file.you can use as it is.

 {
        "arrayVariable": ["1", "2", "3"]
    }

It will work definatly.

answered Jan 08 '18 at 10:46

Nag-Raj

169
1
4
13

Mohamadhassan Ebrahimi · Answer 6 · 2020-10-10T17:53:44.930

The only solution worked for me was something like the answer MickJagger provided, but I think it needs some clarifications. The JSON data file should be something like this:

[
    {
        "anArray": "1, \"2\", 3.0, \"Foo\", false"
    }
]

which it's value is a string, escaping the quotations for string elements. (Note that this example differs from example provided by original question, to cover more use cases.)

The variables is as MickJagger said:

{
    "value": [{{anArray}}]
}

Maybe other solutions works on previous postman versions, but this solution is tested on postman's latest version (by the time of publishing this answer), i.e. v7.34.0 .

Postman - How can I pass array as variable

6 Answers6