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@ -15,6 +15,12 @@ The `terraform_data` resource is useful for storing values which need to follow
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## Example Usage (data for `replace_triggered_by`)
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[The `replace_triggered_by` lifecycle argument](/language/meta-arguments/lifecycle#replace_triggered_by) requires all of the given addresses to be for resources, because the decision to force replacement is based on the planned actions for all of the mentioned resources.
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Plain data values such as [Local Values](/language/values/locals) and [Input Variables](/language/values/variables) don't have any side-effects to plan against and so they aren't valid in `replace_triggered_by`. You can use `terraform_data`'s behavior of planning an action each time `input` changes to _indirectly_ use a plain value to trigger replacement.
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```hcl
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variable "revision" {
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default = 1
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@ -57,26 +63,6 @@ resource "terraform_data" "bootstrap" {
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}
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```
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## Example Usage (force computed value)
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```hcl
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resource "example_resource" "test" {
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name = "foo"
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}
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resource "terraform_data" "example" {
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input = example_resource.test.name
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}
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# This resource has a problem where it will fail during plan if the
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# contains list of resources has not yet been created.
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resource "example_broken_collection" "test" {
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# terraform_data.example.output will stand in as a computed attribute
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# for example_resource.test, which will be unknown until after apply.
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contains = [terraform_data.example.output]
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}
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```
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## Argument Reference
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