Empty select field returns empty string instead of None about emmett

[gi0baro]

I gonna inspect this carefully in the next few days.

Just a couple of things regarding the code you posted:

refers_to(
    {"requirement_id": "Requirement"},
    validation={'presence': True, 'allow': 'empty'}
)

• validation is not a refers_to parameter. That code doesn't really do anything
• presence set to True and allow set to empty are opposite conditions. They won't propagate correctly in the validation strategy. Also mind belongs_to and refers_to already configure presence validation for you.

[SvenKeimpema]

quick question can refers_to already be null/None/empty by default? however that should't matter in this case because it should give an may-not-be empty exception or something then.

[gi0baro]

refers_to already won't require the field to be filled (is on the differences compared to belongs_to.
This is why I need some time to debug this, as it should work.

[SvenKeimpema]

This is a possible fix in RowReferenceInt(helpers.py):

class RowReferenceInt(RowReferenceMixin, int):
    def __new__(cls, id, table: Table, *args: Any, **kwargs: Any):
        try:
            rv = super().__new__(cls, id, *args, **kwargs)
        except ValueError:
            return None
        int.__setattr__(rv, '_refmeta', RowReferenceMeta(table, int))
        int.__setattr__(rv, '_refrecord', None)
        return rv

this isn't a great sollution however it does work with what i have tested