See below stack trace and attached patch. Doesn't fix the underlying
issue in TurboGears, but makes the stack trace less confused.
Exception in thread VisitManager:
Traceback (most recent call last):
File "/usr/lib/python2.4/threading.py", line 442, in __bootstrap
self.run()
File "/home/ccd/VC/svn/turbogears-1.0/turbogears/visit/api.py", line
256, in run
self.update_queued_visits(queue)
File "/home/ccd/VC/svn/turbogears-1.0/turbogears/visit/savisit.py",
line 55, in update_queued_visits
values={'expiry': expiry}).execute()
File "/home/ccd/VC/svn/sqlalchemy/lib/sqlalchemy/sql.py", line 514,
in execute
return self.execute_using(self.engine, *multiparams, **params)
File "/home/ccd/VC/svn/sqlalchemy/lib/sqlalchemy/sql.py", line 461,
in <lambda>
engine = property(lambda s: s._find_engine(), doc="attempts to
locate a Engine within this ClauseElement structure, or returns None if
none found.")
File "/home/ccd/VC/svn/sqlalchemy/lib/sqlalchemy/sql.py", line 1585,
in _find_engine
return self.table.engine
File "/home/ccd/VC/svn/sqlalchemy/lib/sqlalchemy/schema.py", line 41,
in <lambda>
engine = property(lambda s:s._get_engine())
File "/home/ccd/VC/svn/sqlalchemy/lib/sqlalchemy/schema.py", line 40,
in _get_engine
return self._derived_metadata().engine
File "/home/ccd/VC/svn/sqlalchemy/lib/sqlalchemy/schema.py", line
718, in <lambda>
engine=property(lambda s:s.context._engine)
File "/home/ccd/VC/svn/sqlalchemy/lib/sqlalchemy/util.py", line 189,
in __getattr__
raise AttributeError(key)
AttributeError: _engine
Index: lib/sqlalchemy/schema.py
===================================================================
--- lib/sqlalchemy/schema.py (revision 1679)
+++ lib/sqlalchemy/schema.py (working copy)
@@ -715,7 +715,11 @@
"""disposes all Engines to which this DynamicMetaData has been connected."""
for e in self.__engines.values():
e.dispose()
- engine=property(lambda s:s.context._engine)
+ def _get_engine(self):
+ if hasattr(self.context, '_engine'):
+ return self.context._engine
+ return None
+ engine = property(_get_engine)
class SchemaVisitor(sql.ClauseVisitor):
"""defines the visiting for SchemaItem objects"""
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