or has something in MapperExt protocol changed?
File "dbcook/usage/samanager.py", line 189, in query_BASE_instances
return session.query( m.plain )
File "sqlalchemy/orm/session.py", line 638, in query
q = self._query_cls(mapper_or_class, self, **kwargs)
File "sqlalchemy/orm/query.py", line 31, in __init__
self._extension = self.mapper.extension.copy()
AttributeError: '_MapExt' object has no attribute 'copy'
i have very simple one, just for sanity checks:
class _MapExt( sqlalchemy.orm.MapperExtension):
def before_insert( self, mapper, connection, instance):
assert (instance.__class__ is not mapper.class_,
'load_only_object - no save: '
+ str( instance.__class__) + ':'+str(mapper)
)
before_update = before_delete = before_insert
_mapext = _MapExt()
and using that one on all mappers which should be readonly.
svilen
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