terraform中的If语句，使用2个不同的代码块

variable "environment" {
  description = "The environment"
  type        = string
  default     = "dev"
}

resource "aws_instance" "example" {
  ami           = "ami-0c94855ba95c71c99"
  instance_type = "t2.micro"

  # 如果环境是dev，则创建一个安全组
  dynamic "security_group" {
    for_each = var.environment == "dev" ? [1] : []
    content {
      name        = "dev-security-group"
      description = "Security group for dev environment"
    }
  }

  # 如果环境是prod，则创建一个负载均衡器
  dynamic "load_balancer" {
    for_each = var.environment == "prod" ? [1] : []
    content {
      name        = "prod-load-balancer"
      description = "Load balancer for prod environment"
    }
  }
}