Inserted required property in the rename list field, to prevent the l…

[mstolf]

When creating a list on the Deck, there is a validation requiring the name of the list to be informed

But when renaming a list, it was possible to keep it without a name, so I put the required field validation

• Resolves: It is possible to leave the name of a list blank by renaming it #3861
• Target version: master

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Documentation (manuals or wiki) has been updated or is not required

[stefan-niedermann]

Usually my opinion is, that this is a validation, and validations belong into the backend (at least). Other clients will otherwise still be able to create / rename lists to blank.
On the other hand this was a breaking change of the REST-API and should be planned well therefore.

[mstolf]

@stefan-niedermann In this case I followed the list creation pattern, from what I saw it was treated on the front-end too, I understand that in this case the validation would be better on the back-end because it would not open room for errors

[juliushaertl]

Thanks for the pull request, I pushed a fix to also enforce this on the backend, so LGTM 👍

[stefan-niedermann]

cc @desperateCoder

[stefan-niedermann]

@juliushaertl

1. Will there be a database migration? (e. g. converting Blank to Space?)
2. How will the API respond to a request that contains Blank? 400? 422? Any proper error message?

[juliushaertl]

@stefan-niedermann The API will return a 400 Bad Request response as if the title was not set at all with the error message from https://github.com/nextcloud/deck/pull/3862/files#diff-8a98def6b971c75496456ec632f1310cd132642aa188861682457694b47b5096R218