Gatling: How to pass jsonPath saved variable to another exec - scala-gatling

Question

I am new to Gatling and scala. facing issue on passing jsonpath saved variable from one repeat section to another forEach repeat section.
following variable "dcIds" is not able to pass to forEach section. Also please direct me to make the below code more better.
var dcIdd = ""
val r = new scala.util.Random
def orderRef() = r.nextInt(100)
def getCreateRequest: String = {
val data = s"""
[{
"name":"DC_${orderRef()}",
"location":"Seattle, Washington, USA",
"type":"Colocation"
}]
""".stripMargin
data
}
def createAppRequest: String = {
val data = s"""
[{
"name":"App_${orderRef()}",
"owner":"a#a.com",
"dataCenterId":"${dcIdd}",
"strategy":"Rehost",
"migrationStrategy":"Rehost"}]
}]
""".stripMargin
data
}
val scn = scenario("Add DC")
.repeat(DcIterations, "index") {
exec(
http("List_plans")
.get(uri2 + "?plan_id=")
.headers(headers_sec)
.resources(
http("DC add")
.post(uri2)
.headers(headers_sec)
.body(StringBody(session => getCreateRequest))
.check(jsonPath("$.ids[*]").findAll.saveAs("dcIds"))))
}
.foreach("${dcIds}", "dcId") {
dcIdd = "${dcId}"
repeat(AppIterations, "index") {
exec(http("Add Application")
.post(uri1 + "/applications/${dcId}")
.headers(headers_sec)
.body(StringBody(session => createAppRequest))
)
}
}