[Zope-dev] Pointer or reference object

[Jason Spisak]

I meant to use resolve_url, to find any references to an object upon it's
deletion.  Changes in an object's state really wouldn't matter if there is
a way to truely 'mirror' an object.  The name spaces would have to either
be selectable, or since it is a mirror, then it aquires the name space of
the object that it is mirroring (and exact mirror).  Like I said, I don't
have any idea if this 'pointer' is even possible in the ZODB.  Anyone from
DC thinkning about this?

All my best,

Jason



Johan Carlsson writes:

> 
> Yes, I have thought about it.
> 
> One solution I thought of is use an object referens counter
> base class for "referencable objects".
> The base class should be responsible for manageing references
> and take action on the references when the objects state changes.
> 
> One problem is how to handle acqusition.
> Should the referenced object be viewed in it's own context or
> the reference objects context? Or should the contexts merge?
> 
> 
> How did you intend to use ZCataloges for the ZMirror?
> 
> 
> //Johan
> 
> 
> 
> 
> > Zopsters,
> > 
> > This is very out of the blue, but has anyone thought about tackling the
> > 'reference' question by using a phantom Zope object?  I don't know
> > nearly enough Python to answer this question, but maybe someone can.  
> > 
> > Is it possible to create a 'Reference' object that really stores the url
> > of another object and maquerades as the other object's meta_type. 
> > Anything that is asked of the 'Reference' object, just get's passed
> > along to the real object in it's place?  Obviously whenever you delete
> > an object any 'References' with that object's url stored in them get
> > deleted too(ZCatalog could hold these).  Sort of like a reflective
> > mirror.  You see the object in the mirror but you aren't actually
> > looking at the object, you are looking at the mirror.  A ZMirror.
> > 
> > All my best,
> > 
> > 
> > -- 
> > Jason Spisak
> > 444@hiretechs.com
> > 
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Jason Spisak
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