Terraform: De-duping a map object-CodePudding

I'm creating a map object by looping through a list of elements. How do I enforce unique keys in the map such that there are no duplicates?

For example, I have something like below but I get the error: │ Local value local.uri_bucket_map cannot use its own result as part of its expression.

locals {
  inference = [
    { "data_uri" : "s3://my_bucket/model.tar.gz", 
      "model_uri": "account_num.dkr.ecr.us-west-2.amazonaws.com/my_container:latest"
    },
    { "data_uri" : "s3://my_bucket/model.tar.gz",
      "model_uri": "account_num.dkr.ecr.us-west-2.amazonaws.com/my_container2:latest"
    },
    { "data_uri" : "s3://my_bucket_3/model.tar.gz" ,
      "model_uri": "account_num.dkr.ecr.us-west-2.amazonaws.com/my_container3:latest"
    }
  ]

  uri_bucket_map = {
    for x in local.inference : x.data_uri =>
    split("/", split("//", x.data_uri)[1])[0]
  }
}

Expected Map:

{
"s3://my_bucket/model.tar.gz" -> "my_bucket"
"s3://my_bucket_3/model.tar.gz" -> "my_bucket_3"
}

CodePudding user response：

Without much changes to you original code, you can obtain what you want as follows:

  uri_bucket_map = {
    for x in distinct(local.inference[*].data_uri) : x =>
        split("/", split("//", x)[1])[0]
  }