Dynamic Nested Block Question: How to iterate a map / make block optional?

[sveniu]

I had a similar challenge yesterday, and got a response here:

Pattern to handle optional dynamic blocks

Hi @sveniu! The for_each argument inside a dynamic block is expecting a collection to use as the basis for repetition. In your case it looks like each.value.alias is a single object rather than a list, and so what you need for for_each is either a single-item list when the object is set or a zero-length list when it is null. Fortunately, that particular situation is a special power of the [*] splat operator when used on something that isn’t a list: dynamic "alias" { for_each = each.valu…