从flatten()生成一组字符串

huangapple
go评论108阅读模式
英文:

Materialize a Set of String From flatten()

问题

这是尝试从对复杂对象调用flatten()的调用中返回一个集合（字符串）的挣扎。

我的尝试：

在 dev.tfvars 中

  1.     source_endpoints = [
  2.     	{
  3.     		name = "DBSERVER01",
  4.     		ip_address = "xxx.xx.x.xxx"
  5.     		port = "1433",
  6.     		client_databases = [
  7.     			"DB01",
  8.     			"DB02"    		   	
  9.     		]
  10.     	},
  11.     	{
  12.     		name = "DBSERVER02",
  13.     		ip_address = "xxx.xx.x.xxx"
  14.     		port = "1433",
  15.     		client_databases = [
  16.     			"DB03",
  17.     			"DB04"
  18.     		]
  19.     	}
  20.     ]

在 locals.tf 中

  1. locals {
  2.   database_names = flatten([
  3.     for x, source_endpoint in var.source_endpoints : [
  4.        for y, client_database in source_endpoint.client_databases : [      
  5.                 client_database 
  6.       ]
  7.     ]   
  8.   ])
  9. }

应用于资源:

  1.     resource "aws_s3_object" "bronze-cdc" {
  2.       for_each     = local.database_names
  3.       bucket       = module.s3_bronze.bucket.id
  4.       key          = "${each.value}/cdc-files/"
  5.       content_type = "application/x-directory"
  6.     }

Terraform Plan 错误:

  1. > 错误: 无效的 for_each 参数
  2. > 
  3. >   在 s3-folders.tf 的第 19 行, 在资源 "aws_s3_object" "silver-dbo" 中: 
  4. > 19:   for_each     = local.database_names
  5. >     ├────────────────
  6. >     │ local.database_names is tuple with 4 elements
  7. > 
  8. > 所提供的 "for_each" 参数值不适用: "for_each" 参数必须是映射或字符串集，并且您提供了
  9. > 类型为元组的值。

local.database_names 的期望结果:

  1. ["DB01","DB02","DB03","DB04"]

我知道肯定有一种方法将结果投影到一个集合（字符串）中，我只是还没有碰到任何示例。欢迎任何建议。

英文:

It has been a struggle to attempt to return a set(string) from a call to flatten() against a complex object.

My Attempt:

In dev.tfvars

  1.     source_endpoints = [
  2.     	{
  3.     		name = "DBSERVER01",
  4.     		ip_address = "xxx.xx.x.xxx"
  5.     		port = "1433",
  6.     		client_databases = [
  7.     			"DB01",
  8.     			"DB02"    		   
  9.     		]
  10.     	},
  11.     	{
  12.     		name = "DBSERVER02",
  13.     		ip_address = "xxx.xx.x.xxx"
  14.     		port = "1433",
  15.     		client_databases = [
  16.     			"DB03",
  17.     			"DB04"
  18.     		]
  19.     	}
  20.     ]

In locals.tf

  1. locals {
  2.   database_names = flatten([
  3.     for x, source_endpoint in var.source_endpoints : [
  4.        for y, client_database in source_endpoint.client_databases : [      
  5.                 client_database 
  6.       ]
  7.     ]   
  8.   ])
  9. }

Applied To Resource:

  1.     resource "aws_s3_object" "bronze-cdc" {
  2.       for_each     = local.database_names
  3.       bucket       = module.s3_bronze.bucket.id
  4.       key          = "${each.value}/cdc-files/"
  5.       content_type = "application/x-directory"
  6.     }

Terraform Plan Error :

  1. > Error: Invalid for_each argument
  2. > 
  3. >   on s3-folders.tf line 19, in resource "aws_s3_object" "silver-dbo": 
  4. > 19:   for_each     = local.database_names
  5. >     ├────────────────
  6. >     │ local.database_names is tuple with 4 elements
  7. > 
  8. > The given "for_each" argument value is unsuitable: the "for_each"
  9. > argument must be a map, or set of strings, and you have provided a
  10. > value of type tuple.

Desired Result of local.database_names:

  1. ["DB01","DB02","DB03","DB04"]

I know there must be a way to project the result to a set(string), I just have not stumbled across any example. Any Advice is welcomed.

答案1

得分: 1

基于错误输出：

  1. “for_each”参数必须是一个映射或字符串集，而您提供的是元组类型的值。

本地变量的列表类型可以通过使用内置的 toset [1] 函数转换为集合（与 for_each 一起使用）：

  1. resource "aws_s3_object" "bronze-cdc" {
  2.   for_each     = toset(local.database_names)
  3.   bucket       = module.s3_bronze.bucket.id
  4.   key          = "${each.value}/cdc-files/"
  5.   content_type = "application/x-directory"
  6. }

[1] https://developer.hashicorp.com/terraform/language/functions/toset

英文:

Based on the error output:

  1. "for_each" argument must be a map, or set of strings, and you have provided a value of type tuple.

The list type of the local variable can be converted to a set (which works with for_each) by using the built-in toset [1] function:

  1. resource "aws_s3_object" "bronze-cdc" {
  2.   for_each     = toset(local.database_names)
  3.   bucket       = module.s3_bronze.bucket.id
  4.   key          = "${each.value}/cdc-files/"
  5.   content_type = "application/x-directory"
  6. }

[1] https://developer.hashicorp.com/terraform/language/functions/toset

huangapple
  • 本文由 发表于 2023年3月9日 22:12:08
  • 转载请务必保留本文链接：https://go.coder-hub.com/75685762.html
  • amazon-web-services
  • terraform
  • terraform-provider-aws
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