fix #336: detecting relationship as nullable=False #458
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AbdealiLoKo
reviewed
Sep 7, 2022
| @@ -348,7 +348,7 @@ def _add_relationship_kwargs(self, kwargs, prop): | |||
| nullable = True | |||
| for pair in prop.local_remote_pairs: | |||
| if not pair[0].nullable: | |||
| if prop.uselist is True: | |||
| if not self.DIRECTION_MAPPING[prop.direction.name]: | |||
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This should be handling 2 cases:
- For anything which has a list - we expect an empty list - and so nullable=False
- And for anything which has a FK on the table itself - we should consider the nullable from the FK (MANYTOONE case)
if not pair[0].nullable:
if prop.uselist is True or self.DIRECTION_MAPPING[prop.direction.name] is False:
nullable = False
continue
MANYTOONE case:
class Book:
...
author_id = Column(Integer, ForeignKey('author.id'), nullable=False)
author = relationship('Author', lazy='selectin')MANYTOMANY case with uselist=True:
class Book:
...
author = relationship('Author', secondary=book_author, lazy='selectin', uselist=True)MANYTOMANY case with uselist=False:
class Book:
...
author = relationship('Author', secondary=book_author, lazy='selectin', uselist=False)Can we add testcases for various direction X uselist scenarios ?
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Hi @AbdealiJK ,
Have updated the changes based on the feedback in comment
indiVar0508
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@indiVar0508 could you please rebase this? @AbdealiLoKo review welcome after rebase. Thanks guys! |
lafrech
requested changes
Feb 28, 2023
tests/test_conversion.py
Outdated
| @@ -354,6 +354,49 @@ class ModelWithArray(Base): | |||
| assert field.dump_only is True | |||
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| class TestRelationShipKwarg: | |||
tests/test_conversion.py
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| def test_many_to_one_relationship_kwarg(self, models): | ||
| default_converter = ModelConverter() | ||
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| rel = models.Student.__mapper__.get_property("current_school") |
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Please don't use get_property but .attrs (see #495).
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Hello @lafrech and @AbdealiLoKo this PR has not moved since a year. Do you know if anyone will work on it in the next days/week? Regards |
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Attempt to address #336,
using direction mapping to decide if nullable is to be set False or not
pytest result for new branch:
94 passed, 55 warningspytest in master :
94 passed, 55 warnings