Fixed warning in output (fixes #32 and #31)

README.md

@@ -25,7 +25,7 @@ module "db" {
   identifier = "demodb"
 
   engine            = "mysql"
-  engine_version    = "5.7.11"
+  engine_version    = "5.7.19"
   instance_class    = "db.t2.large"
   allocated_storage = 5
 

examples/complete/mysql/main.tf

@@ -26,8 +26,9 @@ module "db" {
 
   identifier = "demodb"
 
+  # All available versions: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_MySQL.html#MySQL.Concepts.VersionMgmt
   engine            = "mysql"
-  engine_version    = "5.7.11"
+  engine_version    = "5.7.19"
   instance_class    = "db.t2.large"
   allocated_storage = 5
   storage_encrypted = false

modules/db_parameter_group/outputs.tf

 # DB parameter group
 output "this_db_parameter_group_id" {
   description = "The db parameter group id"
-  value       = "${aws_db_parameter_group.this.id}"
+  value       = "${element(split(",", join(",", aws_db_parameter_group.this.*.id)), 0)}"
 }
 
 output "this_db_parameter_group_arn" {
   description = "The ARN of the db parameter group"
-  value       = "${aws_db_parameter_group.this.arn}"
+  value       = "${element(split(",", join(",", aws_db_parameter_group.this.*.arn)), 0)}"
 }