表达的地形和多个列表

Question

我想使用以下来表达式使用TF 0.13.7创建CloudWatch仪表板 变量：

variable "redis_replicas" {
  type = list(map(string))
  default = [
    {
      name   = "test-eucentral1-redis-001"
      region = "eu-central-1"
    },

locals {
  replicas = [for i in var.redis_replicas: i.name]
  regions = [for i in var.redis_replicas: i.region]

计划的资源

resource "aws_cloudwatch_dashboard" "cloudwatch_db_redis" {
  dashboard_name = "Redis-Performance"
  dashboard_body = jsonencode({
    widgets : concat(local.body1)
  })
}

  body1 = [ 
    {
      height = 6
      properties = {
        metrics = [ for replica in local.replicas : 
          [
            {
              expression = "m1"
              id         = "e1"
            },
          ], # getting error here 
          [
            "AWS/ElastiCache",
            "ClusterBasedCmds",
            "CacheClusterId",
            replica,
          ],
        ]
        view    = "timeSeries"
      }
      type  = "metric"
    }
  ]

使用

metrics = [for instance in var.redis_replicas : [
[],
[],
]

工作，但适用是失败的。

Error: Putting dashboard failed: InvalidParameterInput: The dashboard body is invalid, there are 50 validation errors:
[
  {
    "dataPath": "/widgets/9/properties/metrics/0/0",
    "message": "Invalid metric field type, only \"String\" type is allowed"
  },

知道如何结合这两个吗？ 如果我在身体上做的话，它可以使用，但是我有不同的副本的图形。