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Merge pull request #23999 from pselle/for_each_docs 

Document for_each key requirements
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Pam Selle 2020-01-31 16:41:25 -05:00 committed by GitHub
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website/docs/configuration/resources.html.md
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@ -340,6 +340,12 @@ infrastructure object associated with it (as described above in
[Resource Behavior](#resource-behavior)), and each is separately created, [Resource Behavior](#resource-behavior)), and each is separately created,
updated, or destroyed when the configuration is applied. updated, or destroyed when the configuration is applied.
-> **Note:** The keys of the map (or all the values in the case of a set of strings) must
be _known values_, or you will get an error message that `for_each` has dependencies
that cannot be determined before apply, and a `-target` may be needed. `for_each` keys
cannot be the result (or rely on the result of) of impure functions, including `uuid`, `bcrypt`,
or `timestamp`, as their evaluation is deferred resource during evaluation.
```hcl ```hcl
resource "azurerm_resource_group" "rg" { resource "azurerm_resource_group" "rg" {
for_each = { for_each = {