Loops

Loops are a way to create multiple instances of a resource or module based on a collection of values. In Watt TF you can use the for_each keyword in your blueprint to iterate over a list or map.

Using for_each in a Transform Block

transform:
  - for_each: input.tags
    target: "resource.my_provider_compute.default.volumes"
    value:
      name: ${item.name}
      size: ${item.size}
      id: ${item_index + 1}

When using the for_each keyword, Watt TF will iterate over the collection provided via CEL, exposing the current element as item, and its 0-indexed position as item_index.

Context variables available during iteration:

• item: The current element when iterating via for_each (otherwise null).
• item_index: The index of the current element when iterating via for_each (otherwise null).