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When helping folks in the community forum, I commonly see questions around more complex patterns in transforming deep data structures into different shapes to work with for_each. We have examples of these patterns in the docs for the functions that they rely on, but they were not previously very discoverable in the main configuration language documentation sections. Here I've moved the "Using Expressions in for_each" subsection on the Resources page above some of the other sub-sections to hopefully make it easier to see, and written out in more detail the two specific patterns that answer a significant number of for_each-related user questions in the hope that readers will be more likely to realize that the links are relevant to what their goals. I also added some more elaboration about the behavior of converting from list to set in the "Using Sets" subsection, because this feature is often a user's first encounter with the set data type and I've inferred from some of the questions I've answered that a number of Terraform users don't have prior experience with set data types in other languages to draw assumptions from. Finally, I added some similar links to the for_each patterns within the for expression documentation itself, to try to make those examples more visible to those who might be discovering the documentation in a different sequence, e.g. by following a deep link shared in an answer to a question in the community forum. |
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README.md
Terraform Documentation
This directory contains the portions of the Terraform website that pertain to the core functionality, excluding providers and the overall configuration.
The files in this directory are intended to be used in conjunction with
the terraform-website repository, which brings all of the
different documentation sources together and contains the scripts for testing and building the site as
a whole.