Terraform: nested for loop from yaml - terraform

Question

I am trying to run nested for loop on terraform.
I have the following Yaml file:
Employees:
- Department:
- Dev:
- name: "danielf"
role: developer
details:
email : danielf#example.com
firstname : daniel
lastname : folsik
- name: "johnb"
role: developer
details:
email : johnb#example.com
firstname : john
lastname : belk
- Ops:
- name: "benol"
role: devops
details:
email : benol#example.com
firstname : ben
lastname : olkin
- name: "pauld"
role: devops
details:
email : pauld#example.com
firstname : paul
lastname : dempler
I am using locals to get the yaml data:
locals {
ou_config = yamldecode(file("employees.yaml"))
}
I want to run into the list of objects on "Dev" and "Ops" lists using for_each.
for example, I want to run on the "Dev" list to get the following list of objects in the first iteration:
[
{
key = "email"
value = "danielf#example.com"
},
{
key = "firstname"
value = "daniel"
},
{
key = "lastname"
value = "folskin"
}
]
The next run on the for_each will be:
[
{
key = "email"
value = "johnb#example.com"
},
{
key = "firstname"
value = "john"
},
{
key = "lastname"
value = "belk"
}
]
etc.
How can I do it on terraform?

Answer 1

If I understand correctly, all you are trying to extract is the details portion of that yaml file ...
Here is what I would do to get all:
locals {
ou_config = yamldecode(file("employees.yaml"))
expanded_names = flatten([
for e in local.ou_config.Employees : [
for d in e.Department : [
for key, person in d : [
for key, value in person : [
value.details
]
]
]
]
])
}
output "test" {
value = local.expanded_names
}
And if we want to filter we add an if key == "Dev"
locals {
ou_config = yamldecode(file("employees.yaml"))
expanded_names = flatten([
for e in local.ou_config.Employees : [
for d in e.Department : [
for key, person in d : [
for key, value in person : [
value.details
]
] if key == "Dev"
]
]
])
}
output "test" {
value = local.expanded_names
}
A terraform plan on that will look like:
Changes to Outputs:
+ test = [
+ {
+ email = "danielf#example.com"
+ firstname = "daniel"
+ lastname = "folsik"
},
+ {
+ email = "johnb#example.com"
+ firstname = "john"
+ lastname = "belk"
},
]
That format should be easier to loop in the final resource than the key value you suggested