Gatling / Scala remove Vector from string value in POST request - scala

Question

I'm trying to send a POST request within a Gatling test.
2 values have to be sent, the first one is extracted from my page content, the second one is hardcoded.
My issue is that when i extract a value from my page content, i end up with a string submitted in my POST request but polluted with the "Vector()" wrapper.
Here is my scenario and how my variable is extracted:
val dossier = exec(http("Content creation - Extract vars")
.get("/node/add/dossier")
.check(css("""input[name="form_token"]""", "value").findAll.saveAs("form_token_node"))
.headers(headers_0))
.pause(2)
.exec(http("Content creation")
.post("/node/add/dossier")
.headers(headers_1)
.formParam("form_token", "${form_build_id_node}")
.formParam("form_id", "node_dossier_form")
.check(status.is(303))
)
And here is how the data look like when they are sent in the POST request:
form_token: Vector(HciBSyvuZ14NIj9HHuebgHYc06gL62B0iKAQ-E-KhvA)
form_id: node_dossier_form
As you can the the form_token variable should not look like this at all, it's breaking the form submission for a unvalid reason.
So my question is, how do i get ride of the Vector() part of the string?
And the answer is use ${form_build_id_node(0)} instead of ${form_build_id_node} to access to the value. Thanks to sschaef.

Answer 1

Here the issue is at saving the attribute.
you have used .findAll.saveAs - Which will save as list taking all the occurrences
If you want to pass only the first occurrences, then it should be
.check(css("""input[name="form_token"]""","value").saveAs("form_token_node"))
instead of
.check(css("""input[name="form_token"]""","value").findAll.saveAs("form_token_node"))
if your going to use foreach or repeat to get more values then you can .findAll.saveAs list and create a logic to iterate the session attribute
${form_build_id_node(i)} in your scenario