Fix sorting on missing non-string fields

[valrus]

Description

Fixes #5512. When sorting on a field, if the field is missing from some items and it has a type, use the type's null value. Otherwise, continue to fall back to an empty string, as I don't think there's much to be done in that case.

The new test test_int_field_present_in_some_items fails without the fix in query.py.

• Documentation.
• Changelog.
• Tests.

[snejus]

Thanks for this, I tested it and it works fine! Added a couple of comments

[snejus]

Looks great. I see that mypy complains about missing mock stubs. Could you by any chance add types-mock to testing dependencies?

[valrus]

Could you by any chance add types-mock to testing dependencies?

I'm guessing you meant typing dependencies and added it there instead, but let me know if I misunderstood. There are a bunch of typecheck errors now but none of them are in the changed files. Is something wrong or is this expected?

[snejus]

Could you by any chance add types-mock to testing dependencies?

I'm guessing you meant typing dependencies and added it there instead, but let me know if I misunderstood.

You're completely correct! Thanks

There are a bunch of typecheck errors now but none of them are in the changed files. Is something wrong or is this expected?

That's expected - mypy should only check the changed files but it ends up reporting issues in related files for some reason 🤷🏼‍♂️ but that's to be sorted separately

[snejus]

Good stuff, thanks for this!