Query.filter() should accept multiple criteria

[soininen]

This used to work:

with DatabaseMapping(url) as db_map:
    db_map.query(db_map.wide_entity_sq).filter(db_map.entity_sq.c.name == "my entity", db_map.entity_sq.c.entity_class_name == "the other class").all()

Currently, it does not since filter() accepts only a single criterion.