[Zope] Undo problem

[Pascal Peregrina]

One last thing I noticed :
Although when displaying B PersistentMapping content I can see A changes,
the undo tab of B says there is nothing to undo (while the undo tab of A
says I can undo whatever property change I did to it).

B class is declared as extending : UniqueObject, SimpleItem, Persistent

Pascal

-----Message d'origine-----
De : Pascal Peregrina 
Envoyé : jeudi 13 janvier 2005 23:06
À : 'dieter at handshake.de'
Cc : 'zope at zope.org'
Objet : RE: [Zope] Undo problem


Ok, I am using Zope 2.7.3, which includes ZODB 3.2.4

In the code below, I am not doing any transaction handling by myself.
When I modify A properties, the call to the B method (that modifies B
PersistentMapping) is made from the method of A that actually modidies A
pesistent data.

So why wouldn't A and B object changes be part of the same transaction ?
Is there any explicit code to make sure to remain in a single transaction ?

Thanks.

Pascal


-----Message d'origine-----
De : Dieter Maurer [mailto:dieter at handshake.de]
Envoyé : jeudi 13 janvier 2005 22:34
À : Pascal Peregrina
Cc : 'zope at zope.org'
Objet : Re: [Zope] Undo problem


Pascal Peregrina wrote at 2005-1-13 17:00 +0100:
> ... 2 objects A and B modified in same transaction ...
>Unfortunately, when I undo a change on A (using undo tab in ZMI),
>information is not removed from B.
>
>Can someone tell me what I did wrong ?

When the change to A and B happens in the same transaction,
then the undo must revert both changes. If it does not, you
hit a bug.

Note that in older Zope versions, invalidation messages
were not sent correctly for "undo" (from ZEO).
This was fixed with ZODB 3.2.

-- 
Dieter

-----Message d'origine-----
De : zope-bounces at zope.org [mailto:zope-bounces at zope.org]De la part de
Pascal Peregrina
Envoyé : jeudi 13 janvier 2005 17:00
À : 'zope at zope.org'
Objet : [Zope] Undo problem


Hi,

I have made 2 Zope products.

One of them is a content object that extends PropertyManager.
The  :
+ _update_property
+ _set_property
+ _del_property
methods have been redefined to add a call to my 2nd product, in order to
notify it about the changes.

--- code excerpt ---
def  _del_property(self,id):
 <call to the PropertyManager method>
 try:
  getToolByName(self,'change_tracker').manage_addChange(<params>)
 except:
  pass
-----

I created an object A of this type.

The 2nd product is a tool with a simple PersistentMapping() that store these
changes information.

--- code excerpt ---
def manage_addChange(self,<params>):
	...
	self._changes[<somekey>]=<somevalue> # self._changes is the
PersistentMapping
	self._changes=self._changes #to be sure PersistentMapping is updated
in ZODB
	...
-----

I created an object B of this type.

When I modify properties on A, I get the information added to B.
So I thought eveything was working fine.

Unfortunately, when I undo a change on A (using undo tab in ZMI),
information is not removed from B.

Can someone tell me what I did wrong ?

Thanks a lot.

Pascal


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