[ZODB-Dev] Any risk about foreign zodb references

[Alexandre Garel]

Hello,

We are building up an application where we use multiple zodb instances. 
Indexation is done using solr.
zodb are served through zc.zodbwsgi. ZODB connections are set only 
on-demand, upon traversal. Each zodb has its intid local utility. Each 
object also has a uuid.

I have a zodb with global parameters objects on /params and distinct 
zodb as /foo /bar /baz and so on.
Objects in a zodb may reference objects of the same zodb or of /params.

I have two possible strategies :

- either store uuid of referenced objects and retrieve objects from solr 
(which will give me a zodb name + intid of object)
- either directly reference the objects of /params

Of course second option seems better and more natural.

I read 
http://svn.zope.org/ZODB/trunk/src/ZODB/tests/multidb.txt?rev=99605&view=markup
and using pdb on databases = request.environ['zodb.connection'] I can 
see the zodb.databases map
which is ok. I also know that _p_oid is unique and _p_jar handled for 
each object so I feel confident on this side.

So before I dive into this, is this kind of cross-database reference 
used on production applications. Is there any-risk or any trick to be 
aware ?

Thanks in advance for any comment :-)

Alex