FunctionIds must start with a lowercase letter

[rswlkr]

Environment details

• OS: macOS 12.1
• Node.js version: 16.14.0
• npm version: 8.3.1
• @google-cloud/functions version: 2.2.0 (V2)

Steps to reproduce

1. Try to create a function that has a functionId above 4 characters and starting with a non-lowercase letter or a number i.e 62fbb0ce81ac165156e08914 (with this client lib or the rest API).

This will return:

'Invalid Request. Violations: {Violation in Function.name=Invalid function_id. Can only contain [-_a-zA-Z0-9] and be between 4-63 characters.}'

Irrespective of the reason for the requirement it would useful if there was guidance here to indicate it...updating the regex perhaps..?

[pattishin]

Hi @rswlkr,
Thanks so much for creating the issue! Just to make sure we understand the ask,
is the request to have this aired in the README, besides guidance within the comments in the code, like so:
https://github.com/googleapis/nodejs-functions/blob/main/src/v2/function_service_client.ts#L852

[rswlkr]

Hello @pattishin - the comments need updated so that the regex is correct or at least the requirement for starting with a lowercase letter stated.

[sofisl]

@pattishin, I will move this over to nodejs-docs-samples, since it seems like the comments are referring to the samples. Let me know if you disagree, we can reopen over here.