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
source_endpoints = [
{
name = "DBSERVER01",
ip_address = "xxx.xx.x.xxx"
port = "1433",
client_databases = [
"DB01",
"DB02"
]
},
{
name = "DBSERVER02",
ip_address = "xxx.xx.x.xxx"
port = "1433",
client_databases = [
"DB03",
"DB04"
]
}
]
在 locals.tf 中
locals {
database_names = flatten([
for x, source_endpoint in var.source_endpoints : [
for y, client_database in source_endpoint.client_databases : [
client_database
]
]
])
}
应用于资源:
resource "aws_s3_object" "bronze-cdc" {
for_each = local.database_names
bucket = module.s3_bronze.bucket.id
key = "${each.value}/cdc-files/"
content_type = "application/x-directory"
}
Terraform Plan 错误:
> 错误: 无效的 for_each 参数
>
> 在 s3-folders.tf 的第 19 行, 在资源 "aws_s3_object" "silver-dbo" 中:
> 19: for_each = local.database_names
> ├────────────────
> │ local.database_names is tuple with 4 elements
>
> 所提供的 "for_each" 参数值不适用: "for_each" 参数必须是映射或字符串集，并且您提供了
> 类型为元组的值。
local.database_names 的期望结果:
["DB01","DB02","DB03","DB04"]
我知道肯定有一种方法将结果投影到一个集合（字符串）中，我只是还没有碰到任何示例。欢迎任何建议。
英文:
It has been a struggle to attempt to return a set(string) from a call to flatten() against a complex object.
My Attempt:
In dev.tfvars
source_endpoints = [
{
name = "DBSERVER01",
ip_address = "xxx.xx.x.xxx"
port = "1433",
client_databases = [
"DB01",
"DB02"
]
},
{
name = "DBSERVER02",
ip_address = "xxx.xx.x.xxx"
port = "1433",
client_databases = [
"DB03",
"DB04"
]
}
]
In locals.tf
locals {
database_names = flatten([
for x, source_endpoint in var.source_endpoints : [
for y, client_database in source_endpoint.client_databases : [
client_database
]
]
])
}
Applied To Resource:
resource "aws_s3_object" "bronze-cdc" {
for_each = local.database_names
bucket = module.s3_bronze.bucket.id
key = "${each.value}/cdc-files/"
content_type = "application/x-directory"
}
Terraform Plan Error :
> Error: Invalid for_each argument
>
> on s3-folders.tf line 19, in resource "aws_s3_object" "silver-dbo":
> 19: for_each = local.database_names
> ├────────────────
> │ local.database_names is tuple with 4 elements
>
> The given "for_each" argument value is unsuitable: the "for_each"
> argument must be a map, or set of strings, and you have provided a
> value of type tuple.
Desired Result of local.database_names:
["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：
“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）：
resource "aws_s3_object" "bronze-cdc" {
for_each = toset(local.database_names)
bucket = module.s3_bronze.bucket.id
key = "${each.value}/cdc-files/"
content_type = "application/x-directory"
}
[1] https://developer.hashicorp.com/terraform/language/functions/toset
英文:
Based on the error output:
"for_each" argument must be a map, or set of strings, and you have provided a value of type tuple.
The list type of the local variable can be converted to a set (which works with for_each) by using the built-in toset [1] function:
resource "aws_s3_object" "bronze-cdc" {
for_each = toset(local.database_names)
bucket = module.s3_bronze.bucket.id
key = "${each.value}/cdc-files/"
content_type = "application/x-directory"
}
[1] https://developer.hashicorp.com/terraform/language/functions/toset
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