In my application I had a problem with self referencial mappers.
Currently I can not reproduce it in a simple example but the attached
diff solved the problem.
I got an error because task.dependencies was changed inside the while loop.
I also tested the change against the tests in sqlalchemy.test.
Apart from the existing errors when running the test there was no new
error introduced.
Jürgen
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Jürgen Kartnaller mailto:juergen_at_kartnaller.at
http://www.kartnaller.at
http://www.mcb-bregenz.at
irc : jukart
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Index: unitofwork.py
===================================================================
--- unitofwork.py (Revision 1518)
+++ unitofwork.py (Arbeitskopie)
@@ -735,7 +735,8 @@
# organize all original UOWDependencyProcessors by their target task
deps_by_targettask = {}
for task in cycles:
- for dep in task.dependencies:
+ deps = list(task.dependencies)
+ for dep in deps:
if dep.targettask not in cycles or
trans.get_task_by_mapper(dep.processor.mapper) not in cycles:
extradeplist.append(dep)
l = deps_by_targettask.setdefault(dep.targettask, [])
