[Zope] LocalFS-1-3-andreas and Zope 2.7.2

[Dieter Maurer]

Chris Withers wrote at 2005-1-31 10:22 +0000:
> ...
>Yes, but remember what LocalFS is doing is trying to spoof Zope into 
>believing objects come from within the ZODB, while actually storing them 
>on the file system.

I do not think that "LocalFS" is in any way interested to simulate
objects in the ZODB. Instead, it emulates a hierarchy apparently rooted
in a ZODB based object. But this is purely an acquisition concept and
completely independent from the ZODB.


>I have a hunch that it probably mixes OFS.Image.File into its "File" 
>objects, and OFS.Image.File is doing something naughty (it usually does, 
>it's got some VERY esoteric code in it ;-) which results in data being 
>comitted to the ZODB.

Indeed, it contains a subtransaction commit.

However, this should only lead to true ZODB writes when
the object either already was persistent or is new
and part of a modified persistent object.

> ...
>> Debugging in an interactive Python session?
>
>Okay, but what am I looking for?

In the current transaction (obtained via "get_transaction()"
for "_objects". You are interested in the code
that adds objects to "_objects". The first object
added to "_objects" is the persistent object that should
not have become modified.

-- 
Dieter