terraform config_error ai_generated true

Error: Unsupported block type or invalid dynamic block iterator

ID: terraform/tf-dynamic-block-error

Also available as: JSON · Markdown
85%Fix Rate
87%Confidence
55Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1 active — — —

Root Cause

Dynamic block used with an unsupported block type or has incorrect iterator/content configuration.

generic

Workarounds

  1. 88% success Verify the block type name matches the resource schema exactly 
    dynamic "block_name" must match a nested block type in the resource; check provider documentation for valid block names

    Sources: https://developer.hashicorp.com/terraform/language/expressions/dynamic-blocks

  2. 85% success Use the correct iterator and content block syntax 
    dynamic "name" { for_each = var.list; content { attr = name.value.attr } } - iterator defaults to the dynamic block label

    Sources: https://developer.hashicorp.com/terraform/language/expressions/dynamic-blocks

Dead Ends

Common approaches that don't work:

  1. Use dynamic blocks for attributes that are not block types 80% fail

    Dynamic blocks can only generate nested block types, not simple attributes; use for expressions for lists/maps

  2. Nest dynamic blocks more than two levels deep 65% fail

    Deeply nested dynamic blocks become unreadable and error-prone; refactor into modules instead

Error Chain

Frequently confused with: