Jeremy Hylton jeremy at alum.mit.edu
Thu Jan 9 12:06:41 EST 2003

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Thomas Guettler <zopestoller at thomas-guettler.de> wrote in message news:<avjj10$oe7$03$1 at news.t-online.com>...
> Max M schrieb:
> > Thomas Guettler wrote:
> > 
> >> Hi!
> >>
> >> I like ZODB very much. With it I don't need to
> >> squeeze my application into database tables.
> >>
> >> Unfortunately you need to set self._p_changed=1
> >> if you change a list of the object.
> >>
> >> Example:
> >> self.my_list.append("foo")
> >> self._p_changed=1 # This is needed
> 
> [cut]
> 
> >> Will this disappear in the future?
> > 
> > Probably not. How should an object know if a mutable subobject has been 
> > changed?
> 
> The method "append" could set the flag.

What kind of object is my_list?  If you use PersistentList, it will
set the flag.  The _p_changed flag is only necessary when working with
mutable subobjects that are not themselves persistent objects.

Jeremy

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