Gatling: How to Post Multiple JSON Objects Individually?

Gatling (Open-Source)
1

Gatling version: 3.11.5 (must be up to date)
Gatling flavor: java kotlin scala javascript typescript
Gatling build tool: maven gradle sbt bundle npm

I read the guidelines and how to ask a question topics.
I provided a SSCCE (or at least, all information to help the community understand my topic)
I copied output I observe, and explain what I think should be.

I have a JSON object with a list of fruits, each with its own name, color, and quantity. I want to send each fruit as its own separate request to a server using Gatling. The request should be a POST request with the fruit data as the request body. How can I achieve this in Gatling?

{
  "fruits": [
    {
      "name": "Apple",
      "color": "Red",
      "quantity": 5
    },
    {
      "name": "Banana",
      "color": "Yellow",
      "quantity": 10
    },
    {
      "name": "Orange",
      "color": "Orange",
      "quantity": 7
    },
    {
      "name": "Grapes",
      "color": "Green",
      "quantity": 8
    }
  ]
}
2

Please show what you’ve tried so far.

3

without revealing the actual code, but I want something along the lines of this, disclaimer i am new to gatling and scala, and this is a one-off task for me that I need to do so please be lenient on me for not understanding the core principles of the “gatling way”.

So, I tried doing it in my Simulation class, which may not be ideal but it’s where they want it.

    .exec(Basket.checkstats)
    .exec { session =>
      val fruitBasketsJson = session("fruitBaskets").asOption[JsArray]
      val orchardId = session("orchardId").as[String]

      if (fruitBasketsJson.isDefined) {
        val fruitBaskets = fruitBasketsJson.get.as[Seq[FruitBasket]]
        val fruitSalad = FruitCreator.createFruitSalad(fruitBaskets, orchardId)

        (fruitSalad \ "fruit").as[Seq[JsValue]].foreach { fruit =>
          exec { session =>
            val fruitSmoothie = Json.stringify(fruit)
            println(fruitSmoothie)
            session.set("fruitSmoothie", fruitSmoothie)
            println("Saved fruit smoothie in session")
            session
          }
            .exec(Basket.submitFruits)
            .exec { session =>
              val inventoryResponse = session("inventoryResponse").as[String]
              println("Inventory response is: " + inventoryResponse)
              session
            }
        }
      }
      session
    }

The submitFruits function resides in another object class that is a post but its response debug statements do not print, even though the simulation completes without errors

val submitFruits: ChainBuilder = exec(http("Submission")
    .post("v1/fruits/results")
    .body(StringBody(session => resultsRequestBody(session)))
    .header("Authorization", session => AuthHeader.createAuthHeader(session))
    .header("Content-Type", "application/json")
    .check(bodyString.saveAs("inventoryResponse"))
    .check(status.is(200))
  ).exec { session =>
    val response = session("inventoryResponse").as[String]
    session.set("inventoryResponse", inventoryResponse)
    println("Response: " + inventoryResponse)
    session
  }
}
4

this is static data, known before test ?
If yes you can use feeder

Why you don’t use Java, Simulations in Java are easier to implement.

5

Unfortunately, it’s not static data. There is code that processes this and produces the final object for me, in a way similar to what is shown. And the painful part is this is the last step, I have the data, and can loop over it in the form i want as a payload just fine but I cannot for the life of me figure out how to send all of them via a post.