我有这个资源和这个带有变量的动态块：
```hcl
variable "services" {
  description = "服务映射"
  type = map(object({
    port = number
    uri  = optional(string)
  }))
}

services = {
  "auth-service" = {
    port = 3050
    uri  = "example1"
   }
"clone-service" = {
    port = 3040
   }
}

resource "kubernetes_ingress_v1" "eks_global_ingress" {
[...]
dynamic "rule" {
     # 我制作了这个表达式来绕过没有URI的服务。
      for_each = { for k, v in var.services : k => v if v["uri"] != null }
      content {
        http {
          path {
            path = "/${rule.value["uri"]}/*"
            backend {
              service {
                name = "${rule.key}-i-svc"
                port {
                  number = rule.value["port"]
                }
              }
            }
          }
        }
      }
    }

services = {
  "auth-service" = {
    port = 3050
    uri  = ["example1", "example2"]
  }
  "clone-service" = {
    port = 3040
  }
}

Is there anything else you would like to know or clarify about this code?
<details>
<summary>英文:</summary>
I have this resource and this dynamic block with this variables:

At this point everything is ok, but now i want to add another URI to the same service. So i make a list in the URI like below:

But with this i cant include another for_each in the Dynamic Block. How can i filter null URI and at the same time, loop the code with 2 or more URI as a list?
I expect that the rule is duplicated "x" times over the number of URI present on the list, and if a URI value is not present on the map (null) the "for_each" bypass this rule. 
</details>
# 答案1
**得分**: 0
1. 完全可以在另一个动态块内部使用更多的动态块。
2. 参数 http.path 也是[块的列表][1]，所以你应该能够做类似这样的事情：
```hcl
dynamic "rule" {
  # 通过此表达式绕过没有 URI 的服务。
  for_each = { for k, v in var.services : k => v if length(v["uri"]) > 0 }
  content {
    http {
      dynamic "path" {
        for_each = toset(rule.value["uri"])
        content {
          path = "/${path.key}/*"
          backend {
            service {
              name = "${rule.key}-i-svc"
              port {
                number = rule.value["port"]
              }
            }
          }
        }
      }
    }
  }
}