Added validation_error_cause to config.

[zakstucke]

Change Summary

Hooks up validation_error_cause: bool config value added to pydantic core.

Related issue number

Fix #6498

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

Selected Reviewer: @hramezani

[zakstucke]

please review

[hramezani]

Thanks @zakstucke for this patch 🙏

It would be great to have at least one test for this config flag.

Please update

[zakstucke]

@hramezani its got quite a few different pathways tested fully in pydantic core. Do you want me to add exception group as a test dep in pydantic as well and test all the different pathways, or something simpler?

Pathways:

• Disabled, nothing
• <3.11, enabled no backport -> ImportError with msg to install backport
• <3.11 with backport -> works using UserWarning
• =>3.11 with/without backport -> works using notes

[hramezani]

@zakstucke I am thinking about having only the last option(=>3.11 with/without backport -> works using notes) because the other cases are tested already in pydantic-core. But let's see what is @samuelcolvin idea here.

[zakstucke]

@hramezani ok sounds good, just added test for 3.11 modern pathway, disabled and enabled.

Please review

[zakstucke]

@hramezani

[hramezani]

Thanks @zakstucke for refreshing the PR, we will include this in the next release

[sydney-runkle]

Looks great! Thanks @zakstucke for the contribution 😄

[sydney-runkle]

@zakstucke, do you want to change the description of this PR to have Fix #6498? instead of just the issue reference?

[zakstucke]

@sydney-runkle done! (If I understood you correctly)