Jsonschema array tuples can lead to submittable forms that don't meet the schema

[camden-penn]

Description
The Formly array component doesn't have a way to distinguish between list-validation arrays and tuple-validation arrays. This can cause problems because tuple-validation means the position of elements matters. As the current implementation seems to assume list-validation, always allowing users to delete items from the middle of an array, it is possible for a user to arrive at a form that believes itself valid without actually meeting the schema.

Minimal Reproduction
https://stackblitz.com/edit/formly-jsonschema-tuple-shenanigans?file=src%2Fassets%2Fjson-schema%2Ftuple.json

Your Environment

• Angular version: 10.2.5
• Formly version: 5.10.20

Additional context
This minimal example was based on the second negative example under json-schema.org's explanation of tuple validation.

[aitboudad]

We didn't add the type validator yet, postponed it to V6.

Related issues:

• JSONSchema with string of arrays is not validated correctely #2750
• Typing char or string in integer type field is possible on Firefox, no validation message #2360

[camden-penn]

If the array component knew whether it was working with a list or a tuple, couldn't it simply not let the user delete from the middle of the tuple? As far as I can tell, that would prevent the problem from happening in the first place.

[aitboudad]

This issue has been fixed and released as part of 5.10.23 release.

Please let us know, in case you are still encountering a similar issue/problem.
Thank you!