Im just trying to empties a one to many records by doing this:
load.commodities = []
then what happens next is:
IntegrityError: (IntegrityError) null value in column "load_id" violates
not-null constraint
DETAIL: Failing row contains (35d39bd9-ca61-43ef-a5c5-7590c82aca1d, 2014-05-11
06:48:27.028485-04, 2014-05-11 06:51:41.511231-04, Product 4, , 4, 4, 4, 4, ,
a637cc84-fd6e-417c-bb59-5a4e3a435696, a8fca522-3b5f-429f-b58b-c0de4c05d725,
null, , inch, lbs).
'UPDATE load_commodities SET updated_at=%(updated_at)s, load_id=%(load_id)s
WHERE load_commodities.id = %(load_commodities_id)s' {'load_commodities_id':
'35d39bd9-ca61-43ef-a5c5-7590c82aca1d', 'load_id': None, 'updated_at':
datetime.datetime(2014, 5, 11, 6, 51, 41, 511231)}
it seems like it triggers update and set all the fields to None instead of
delete.
here're my classes:
class Load(Base):
__tablename__ = 'loads'
id = Column(GUID, primary_key=True, default=uuid.uuid4)
....
commodities = relationship("LoadCommodity", backref=backref("load",
uselist=False))
class LoadCommodity(Base):
__tablename__ = 'load_commodities'
id = Column(GUID, primary_key=True, default=uuid.uuid4)
load_id = Column(GUID, ForeignKey('loads.id'), nullable=False)
....
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