Terraform元组是否通过移除空对象进行映射

Question

我试图在其他资源中为for_each循环创建局部变量，但无法按预期生成局部映射。

以下是我尝试过的。(地形0.12(

预期映射到循环

temple_list = { "test2-role" = "test-test2-role", ... }

main.tf

locals {
tmpl_list = flatten([ 
for role in keys(var.roles) : {
for tmpl_vars in values(var.roles[role].tmpl_vars) : 
role => "test-${role}" if tmpl_vars == "SECRET"
}
])
}
output "tmpl_list" {
value = local.tmpl_list
}
variable "roles" {
type = map(object({
tmpl_vars = map(string)
tags = map(string)
}))

default = {
"test-role" = {
tmpl_vars = {test = "y"}
tags = { test = "xxx"}
}
"test2-role" = {
tmpl_vars = { token = "SECRET" }
tags = {}
}
"test3-role" = {
tmpl_vars = {test = "x"}
tags = {}
}
}
}

错误来自合并

| var.roles is map of object with 3 elements
Call to function "merge" failed: arguments must be maps or objects, got
"tuple".

不合并

locals {
tmpl_list = flatten([ 
for role in keys(var.roles) : {
for tmpl_vars in values(var.roles[role].tmpl_vars) : 
role => "test-${role}" if tmpl_vars == "SECRET"
}
])
}
output "tmpl_list" {
value = local.tmpl_list
}
variable "roles" {
type = map(object({
tmpl_vars = map(string)
tags = map(string)
}))

default = {
"test-role" = {
tmpl_vars = {test = "y"}
tags = { test = "xxx"}
}
"test2-role" = {
tmpl_vars = { token = "SECRET" }
tags = {}
}
"test3-role" = {
tmpl_vars = {test = "x"}
tags = {}
}
}
}

未合并的结果

tmpl_list = [
{},
{
"test2-role" = "test-test2-role"
},
{},
]

我尝试了tomap((等其他函数，但似乎对我不起作用。(我也不知道为什么会创建空的。(

如何将此元组转换为没有空元组的映射？

Answer 1

您可以通过两个步骤完成：

1. 将其转换为已筛选的对象列表：

locals {  
result = flatten([
for role, role_value in var.roles: [
for tmpl_vars in role_value.tmpl_vars: {
key = role
value = "test-${role}"
} if tmpl_vars == "SECRET"
]
])
}

local.result将具有以下值：

[
{
"key" = "test2-role"
"value" = "test-test2-role"
},
]

2. 然后很容易用for将其转换为地图：

my_map = { for item in local.result: item.key => item.value }

它给出：

{
"test2-role" = "test-test2-role"
}