[Checkins] [zopefoundation/mongopersist] 0adb9c: Bug: Do not rely on obj.__cmp__() in data manager.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/mongopersist
  Commit: 0adb9c5de22876d9b21068715d36aa86727ba2c8
      https://github.com/zopefoundation/mongopersist/commit/0adb9c5de22876d9b21068715d36aa86727ba2c8
  Author: Stephan Richter <stephan.richter at gmail.com>
  Date:   2014-02-09 (Sun, 09 Feb 2014)

  Changed paths:
    M CHANGES.txt
    M setup.py
    M src/mongopersist/datamanager.py
    M src/mongopersist/tests/test_datamanager.py
    M src/mongopersist/zope/container.py

  Log Message:
  -----------
  Bug: Do not rely on obj.__cmp__() in data manager.

Objects where compared within the transaction manager for different
reasons. This could create complicated scenarios (including data loss) when
the ``__cmp__()`` method of the object was non-trivial. Now the result of
the ``id(obj)`` function is used to compare objects, which is very save,
since the behavior of this function call cannot be changed for an object.