How to create dynamic json using for loop in scala to pass in Gatling post request

Question

I am new to scala ,Any help would be very much appreciated

I have a scala Map which has around 10 ids and 10 weights Map(id->id,weight->weight)

For post request in gatling , i would like to pass my request on basis of for loop Expected json: so for example , if there are 10 key values pair in my map - i would like to add 10 inner array in my final json string and there should be a single request.

myjson=

of[
     {
      "id":pis
      "weight":20.3
     }
  ]

Expected json=

of[
     {
      "id":pis
      "weight":20.3
     },
    {
      "id": 2nd value from for loop
      "weight":2nd value from for loop
     },
    {
      "id": 3rd value from for loop
      "weight":3rd value from for loop
     }

    ]

Amerousful · Answer 1 · 2021-07-01T09:06:24.417

1

Gatling provides Pebble Templates which can define and fill your body structure

There is a example how it works: https://gatling.io/2018/11/gatling-3-pebble-templating/

In your case body will be likes:

.body(PebbleStringBody(
      """{
        |  "of": [ {% for value in mapValues %}
        |    {
        |      "id": "{{value.id}}",
        |      "weight": "{{value.weight}}
        |    }{% if loop.last %}{% else %},{% endif %}
        |    {% endfor %}
        |  ]
        |}
        |""".stripMargin))

Feeder:

val mapValuesFeeder = Iterator.continually(Map("mapValues" -> List(
    Map("id" -> "1", "weight" -> "10"),
    Map("id" -> "2", "weight" -> "20"),
  )))

edited Jul 01 '21 at 09:06

answered Jun 30 '21 at 08:05

Amerousful

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Thanks for your answer, Can you please also tell mw how the Map would look like - I am trying to use feeder map , its not working. – surbhi khare Jun 30 '21 at 14:10
@surbhikhare I added example in my answer. – Amerousful Jul 01 '21 at 09:07
Do you know how to populate this map with csv data Csv – surbhi khare Jul 01 '21 at 22:17
Sorry it's a different question , but trying my luck :) – surbhi khare Jul 01 '21 at 22:17
@surbhikhare you're welcome! Alse you can vote and accept my answer. https://stackoverflow.com/help/someone-answers – Amerousful Jul 02 '21 at 11:33

How to create dynamic json using for loop in scala to pass in Gatling post request

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