Possible issue with bit fields

[jkugler]

This may be an issue with me not understanding fixtures and/or SQLAlchemy, but any assistance would be great!

I have some data dumped from an MS SQL DB, which is using BIT fields for true/false. I'm trying to load it into a PostgreSQL DB for testing. The data is exported by getting the records (via SQLAlchemy), and then looping over them and generating each dict thus:

def as_dict(r):
    d = {}

    for c in r.__table__.columns:
        o = getattr(r, c.name)
        d[c.name]= o

    return d

That works great, properly formats UUIDs and date/times. However, the bit fields come out as 'true' or 'false.' While that is what they are being used as, this then creates issues later. When I try to load them into the PG DB (again, via Flask-Fixtures), I get an exception of:

sqlalchemy.exc.ProgrammingError: (psycopg2.ProgrammingError) column "isActive" is of type bit but expression is of type boolean

If I change the true/false entries to 1/0 in the Yaml file, I then get:

sqlalchemy.exc.ProgrammingError: (psycopg2.ProgrammingError) column "isActive" is of type bit but expression is of type integer

Is there a way to mark them such that Flask-Fixtures will turn them back into Bit objects before it tries to insert them? Does Flask-Fixtures introspect on the column

I realize the proper answer here is "convert them to boolean fields," but this is a legacy database, and quick-and-dirty changes to the schema would not happen soon. :)

This may well be an issue with SQLAlchemy, as it seems it converts from the bit field to a true/false value when selecting, but then does not convert back when inserting the value.

How DO you pass a bit object to SQLAlchemy?