Error: Invalid count argument when password comes from an aws_ssm_parameter resource

[JoshCoady]

Describe the Bug

│ Error: Invalid count argument
│ 
│   on .terraform/modules/cms.db/main.tf line 54, in resource "random_password" "password":
│   54:   count   = module.this.enabled && var.master_password == "" ? 1 : 0
│ 
│ The "count" value depends on resource attributes that cannot be determined until apply, so Terraform cannot predict how many instances will be created. To work around this, use the -target argument to first apply only the resources that the count depends on.

Expected Behavior

Terraform plan can be applied without resource targeting.

Steps to Reproduce

set password to the value of an ssm param, for example:

master_password  = aws_ssm_parameter.db_password.value

Screenshots

No response

Environment

Terraform 1.5

Additional Context

No response

[JoshCoady]

In further testing, the same thing happens with a random_password resource:

master_password     = random_password.db_password.result

...

resource "random_password" "db_password" {
  length  = 100
  special = false
}

[demi4-com]

same issue