[Zope3-Users] How do I find out references to objects in ZODB

[Marius Gedminas]

On Fri, May 02, 2008 at 10:17:46PM +0800, Yuan HOng wrote:
> Is it possible to find out what other objects are referencing a
> particular object in ZODB?

Not easily -- you'd have to traverse the object graph yourself to see if
you can find any references.

> In particular, I want to prevent some content objects, like images,
> from being removed from the folder if they are used in some other
> content object, like a news article.
> 
> Do I have to keep track of object referencing in ZODB myself through
> events or there are some built-in mechanism in ZODB to take care of
> this for me?

Your best bet is to keep track of this yourself.  Indexes and catalogs
may help.

Marius Gedminas
-- 
Given enough eyeballs all bugs are shallow.
                -- Eric S. Raymond, "The Cathedral and the Bazaar"
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