Tres Seaver <tseaver@...> writes: > On 03/04/2013 06:46 AM, Maurits van Rees wrote: > > > If that commit helps, then some test errors will show up in > > Products.CMFDefault, mostly this: > > > > TypeError: Object has default comparison > > New BTrees expects objects used as keys to have "real" comparison > semantics: Python's default (based on id()) is not suitable for > persistent objects.
The most common source of this warning is trying to store `None`: >>> from BTrees.OOBTree import OOBTree >>> tree = OOBTree() >>> tree[1] = 1 >>> tree[None] = 2 Traceback (most recent call last): File "<console>", line 1, in <module> TypeError: Object has default comparison Unfortunately the ZCatalog has advertised support for storing None for some time, so there's likely some code out there which uses this. Hanno _______________________________________________ Zope-CMF maillist - Zope-CMF@zope.org https://mail.zope.org/mailman/listinfo/zope-cmf See https://bugs.launchpad.net/zope-cmf/ for bug reports and feature requests
