How to get off a string from Gatling Expression[String]

Question

I'm trying to compile a string like :

val route = "this/is/my/url/${body2.id}"

where body2 is a json response from a previous request.

So I tried to compile this string with :

val routeExpression = (route).el[String]

And I saw on this question : Getting the String out of a Gatling expression

I should do something like :

def getRoute = {
  routeExpression.map { route => route }
}

but this function return a Validation[Expression[String]]. How could I get the string compiled ?

Cheers.

Answer 1

Finally the problem was not the one asking. In fact I was saving all the json inside the session. But the problem was gatling expression like ${body2.id} works only if the session attribute is like :

Map(body2 -> Map(id -> 45787))

but mine was

Map(body2 -> "{ id: 45787 }")

so I used Jackson library to parse my json to convert it to a map, and it solved the problem.

EDIT

Just have to specify the type as Stephane Landelle said :

check(jsonPath("$").ofType[Map[String, Any]].saveAs("myJson"))