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"]
}

• Karthik T: 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!
• Henke: Does this answer your question? Postman: Can i save JSON objects to environment variable so as to chain it for another request?

Answer 1

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

enter image description here

Answer 2

using variable with a same name will give you an array

enter image description here

• Mike D3ViD Tyson: it' doesn't seems to work, it complains: "variable will be overwritten by a duplicate key"...
• WasiF: @MikeD3ViDTyson It worked, may be they have updated the structure to create an array. If you find the way please let us know.
• marhyno: The new way of storing is values separated by commas without brackets or quotes - value1,value2,value3

Answer 3

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.

Answer 4

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);

Answer 5

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.

Answer 6

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 .