[ZODB-Dev] know the state of an object

[dvd]

On Thu, 2005-10-13 at 19:04 -0400, Tim Peters wrote:

> > from the connection object,
> 
> You didn't say which version of ZODB you're using.  Since you believe
a
> Connection keeps track of which objects have been modified, I'll
assume
> you're using ZODB 3.3 or later (which is either true, or your belief
about
> who keeps track of modified objects is false ;-)).

yup i missed this info, i'm using zodb 3.4

> 
> > so i overload the __setattr__ method in my base-class and keep track
> > of the modified objects
> >
> > But that's the problem, __setattr__ is called also when ZODB loads
the
> > objects from the storage and reconstructs it, so is there a way to
know
> > the state of the object (unpickilng, modified, clean etc etc)?
> 
> The good news is that obj._p_state reveals the current state of a
persistent
> object.  The possible values are exposed by the `persistent` module:

I see, yesterday, after my message obviously, i see the light and write
this code

class PersistentObject(Persistent):
    [... some code ...]
    def __setattr__(self, attr, value):
        if not self._p_setattr(attr, value):
            super(PersistentObject, self).__setattr__(attr, value)

        if not attr.startswith('_p_') and self._p_changed and attr!
='_Modified':
            self.Touch()


> So, in the end, I don't see any hope for you via this route, short of
this:
> register an object as changed in your __setattr__ without worrying at
all
> about _why_ __setattr__ was called.  Later, when you "do something"
with
> your list of modified objects, simply ignore any whose state at that
time is
> UPTODATE.  Those are exactly the objects whose state got materialized
but
> didn't change thereafter.

Ok, thank you for your help

bye