fix(ui): fallback to default locale checkbox passes wrong value

[jessrynkar]

What?

Allows document to successfully be saved when fallback to default locale checked without throwing an error.

Why?

The fallback to default locale checkbox allows users to use fallback data for required fields in additional locales, this has been broken since the release of v3.

How?

The fallback checkbox should set the field value to null allowing it to get processed through the standard locale logic and get replaced by fallback data. However, the field was passing true which would break the form and prevent it from saving.

Also adds tests to localization/e2e.

Fixes #11245

[devj3ns]

Thanks for the fix, @jessrynkar!

Quick question: When the array field is set to read-only, is the checkbox still displayed? I believe it shouldn't be shown in that case— just wanted to confirm.

[jessrynkar]

Thanks for the fix, @jessrynkar!

Quick question: When the array field is set to read-only, is the checkbox still displayed? I believe it shouldn't be shown in that case— just wanted to confirm.

Hi @devj3ns - thanks for raising this, currently the fallback checkbox is displayed for readOnly fields but it shouldn't be. I have added a fix for this as part of this PR.

[DanRibbens]

CI is failing on all the sql db adapters. I think there is more here we need to do to support this on the db side. This is going to take some thinking through since we can't set null on the DB side the same as with mongodb.