[ZODB-Dev] TmpStore missing loadBefore

[Sidnei da Silva]

We've hit a case where loadBefore would get called on TmpStore during
plone.org migration. 

Unfortunately TmpStore doesn't implement loadBefore. There seems to be
no tests for this. I tried to write one and provide a fix but just
occurred me that TmpStore tries to be a 'simpler FileStorage that
mixes with the current storage'.

Wouldn't it be simpler to make TmpStore subclass from FileStorage and
just delegate to the current storage where appropriate?
-- 
Sidnei da Silva
Enfold Systems, LLC.