[Zope-dev] ZPatterns - help!

[bens@killersite.com]

I am trying to create 'virtual' DataSkins that totally live in a 
SQL database. How do I create a new item in a rack without 
providing an initial ID for the object?

Here's what I've been doing so far...

1. I have Storage set to "loaded by accessing attribute 'id'".
2. I have an ADD trigger that creates a MySql row and returns the 
LAST_INSERT_ID() as "id" ("Keeping:id=RESULT.new_obj").
3. I have a CHANGE trigger that updates the MySql row with 
attributes.
4. I have a CatalogTrigger.

Now it almost works when I try to add an object with key=random() 
by:
<dtml-let ni="newItem(key)"
          nips="ni.propertysheets.get('Basic')">
<dtml-call "nips.manage_changeProperties(REQUEST)">

So what I belive this is doing is creating a temperery object then 
changing it's ID (which sounds very screwy).
The problem I am having is first of all the Catalog is indexing the 
temporery random key not the one returned from the CREATE trigger. 
Please advise.

Also in my CHANGE trigger I am calling SQL like this:
UPDATE sc_account SET
<dtml-in CHANGED_ATTRS>
<dtml-var sequence-item>= <dtml-var 
expr="_.getattr(object,_['sequence-item'])" sql_quote>
<dtml-unless sequence-end>,</dtml-unless>
</dtml-in>

This updates all my 'string' fields but not the 'int' ones I think 
because they are quoted by "sql_quote" (although I'm not sure). 
Please advise.

I know this is a rambling email but I would greatly appreciate your 
help in creating DataSkins that are stored in RDBMS not 
persistently.

Once I get this working I'll post a full How-To (unless there is 
one already that I've missed).

-Ben