Support multiple validation blocks during completion for variable block

[seandockery]

The variable block can accept multiple validation blocks in terraform files. However, after I declare a validation block inside a variable block, completion in vscode does not offer validation again in the same variable block. I can work around the issue by deleting other validation blocks temporarily, but it would be nice if that wasn't necessary. I am using v2.14.0 of the HashiCorp Terraform extension. Thanks!

[seandockery]

I imagine that this issue is in the wrong project, that the rule of there being a maximum of 1 validation block under a variable block is probably somewhere else. If you can guide me to the right project, I'll post an issue there.

[seandockery]

I think that I found it:

https://github.com/hashicorp/terraform-schema/blob/b66475e716184a7e5abdd30ffc849614c6f1f618/internal/schema/0.14/variable_block.go#L70

[radeksimko]

Good catch - thank you for the report @seandockery

You are right indeed that multiple validation blocks are allowed/expected:
https://github.com/hashicorp/terraform/blob/d35bc0531255b496beb5d932f185cbcdb2d61a99/internal/configs/named_values.go#L132-L138

and you're also right about the place where this can be fixed. 😄

I just patched it upstream and raised #610

Additionally this fact also doesn't seem very obvious from the docs here:
https://www.terraform.io/docs/language/values/variables.html#custom-validation-rules
so I submitted a patch for these docs too: hashicorp/terraform#29299

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