I have a boolean field in the mysql db table.
# table model
class TestCase(Base):
__tablename__ = \'test_cases\'
...
obsoleted = Column(\'obsole
I have a look what exact query is generated for using SQLAlchemy
when ==
and is_ when the database dialect is Postgresql for boolean field:
for ==
we get:
field == False
is converted to field = false
field == True
is converted to field = true
field == None
is converted to field IS NULL
for is_()
we get:
field.is_(False)
is converted to field IS false
field.is_(True)
is converted to field IS true
field.is_(None)
is converted to field IS NULL
NOTE: is_(not None)
will be evaluated to is_(bool(not None)
what gives is_(True)
giving field = true
so you rather go for isnot(None)
producing field IS NOT NULL