Reference variable in a for loop in terraform - amazon-web-services

Question

I have a list of accounts declared under variable "acct". I need to create as many ARNs as the accounts below using this list. How to do it? The below code gives me attribute error:
A reference to a resource type must be followed by at least one attribute access, specifying the resource name.
variable "acct"{
type = list(string)
default = ["111111111111","22222222222",.....]
}
data "aws_arn" "SrcArn" {
account = [for acc in var.acct : acc ]
arn = ["arn:aws:logs:us-east-1:${account}:*"]
}
I need to create a list of arns which then can be used further down in the code. Can these then be referenced below like this:
condition {
test = "ArnLike"
values = data.aws_arn.SrcArn
variable = "aws:SourceArn"
}

Answer 1

If you want to use aws_arn, you can use to this.
variable "acct"{
type = list(string)
default = ["111111111111","22222222222",.....]
}
data "aws_arn" "SrcArn" {
count = var.acct
arn = ["arn:aws:logs:us-east-1:${var.acct[count.index]}:*"]
}
And if you wanna make arn_list,
locals {
# only use to variable.
# not use to data "aws_arn"
arn_list_only_use_to_variable = [for account in var.acct: "arn:aws:logs:us-east-1:${account}:*"]
# use to data "aws_arn"
src_arn = data.aws_arn.SrcArn
arn_list_2_use_to_data_aws_arn = [for account in src_arn: account]
}
...
condition {
test = "ArnLike"
values = local.arn_list_only_use_to_variable
variable = "aws:SourceArn"
}
...