Re: [Sqlalchemy-tickets] [sqlalchemy] #2794: CircularDependencyError with jython because WeakSequence doesn't preserve order

[sqlalchemy <mi...@zz...>]

#2794: CircularDependencyError with jython because WeakSequence doesn't preserve
order
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      Reporter:  sayap            |      Owner:  zzzeek
          Type:  defect           |     Status:  new
      Priority:  medium           |  Milestone:
     Component:  utils            |   Severity:  no triage selected yet
    Resolution:                   |   Keywords:
Progress State:  awaiting triage  |
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Comment (by zzzeek):

 OK great, yeah if I do this and run tests with --reversetop:

 {{{
 diff --git a/lib/sqlalchemy/orm/util.py b/lib/sqlalchemy/orm/util.py
 index ae1ca20..1d2d30d 100644
 --- a/lib/sqlalchemy/orm/util.py
 +++ b/lib/sqlalchemy/orm/util.py
 @@ -1327,3 +1327,11 @@ def randomize_unitofwork():
      from sqlalchemy.testing.util import RandomSet
      topological.set = unitofwork.set = session.set = mapper.set = \
              dependency.set = RandomSet
 +    from sqlalchemy.util import WeakSequence
 +    import random
 +    def _random_iter(self):
 +        l = self._storage.values()
 +        random.shuffle(l)
 +        return iter(l)
 +    WeakSequence.__iter__ = _random_iter
 +
 }}}

 crazy failures.  very weird that one isn't hitting in pypy.

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Ticket URL: <http://www.sqlalchemy.org/trac/ticket/2794#comment:3>
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