Thanks for answer.
I dynamicly create classes, their columns, their relationship.
Add new works with new_instances, who will load after defintion, and
already loaded classes who doesn't contain foreignkeys(for relationships).
session.expire(attribute), does not work, because contained foreign key
does not refreshed, and sqlalchemy think that is equal None
Kludge is look for adding foreign_keys and refresh them
if refreshed_attribute is not None:
for instance in gc.get_objects():
if isinstance(instance, refreshed_attribute['factory_class']):
if instance in session.dirty or instance in session.deleted:
session.refresh(current_instance, attribute_names =
[refreshed_attribute['refreshed_attribute']])
elif instance in session and instance not in session.new:
session.refresh(instance)
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
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