Terraform: Add item to a DynamoDB Table - amazon-dynamodb

Question

What is the correct way to add tuple and key-pair values items to a DynamoDB database via Terraform?
I am trying like this:
resource "aws_dynamodb_table_item" "item" {
table_name = aws_dynamodb_table.dynamodb-table.name
hash_key = aws_dynamodb_table.dynamodb-table.hash_key
for_each = {
"0" = {
location = "Madrid"
coordinates = [["lat", "40.49"], ["lng", "-3.56"]]
visible = false
destinations = [0, 4]
}
}
item = <<ITEM
{
"id": { "N": "${each.key}"},
"location": {"S" : "${each.value.location}"},
"visible": {"B" : "${each.value.visible}"},
"destinations": {"L" : [{"N": "${each.value.destinations}"}]
}
ITEM
}
And I am getting the message:
each.value.destinations is tuple with 2 elements
│
│ Cannot include the given value in a string template: string required.
I also have no clue on how to add the coordinates variable.
Thanks!

Answer 1

List should be something like that :
"destinations": {"L": [{ "N" : 1 }, { "N" : 2 }]}
You are trying to pass
"destinations": {"L": [{ "N" : [0,4] }]}
Also you are missing the last } in destinations key

Answer 2

TLDR: I think the problem here is that you are trying to put L(N) - i.e. a list of numeric values, while your current Terraform code tries to put all the destinations into one N/number.
Instead of:
[{"N": "${each.value.destinations}"}]
you need some iteration over destinations and building a {"N": ...} of them.

Answer 3

"destinations": {"NS": ${jsonencode(each.value.destinations)}}
Did the trick!