I use declarative base for defining classes.
I have a constraint that only works in Postgres. How do I declare
that constraint "lowername_check" only if the session is going
postgres (and not to sqlite, for example).
pg_only_constraint = CheckConstraint("lowername !~
'[[:upper:]]'",name='lowername_check'),
class Data(Base):
__tablename__ = 'Data'
lowername=Column(Unicode, nullable=False)
__table_args__ = (
pg_only_constraint, {}
)
Thanks!
Gregg Lind
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