Hi Johann,

On 03/10/2012, at 5:26 PM, Johann Werner wrote:

> derived attributes are "computed" by the database and thus those values are 
> only updated when an eo is fetched into memory. In your case you are creating 
> a new eo that has NULL for these attributes and as long as WO uses that eo or 
> its snapshot cache those values will be still NULL. You have to refetch the 
> eo to update the derived attributes.

Thanks for the explanation.  Looks like a derived attribute is not the solution 
for this use case, then.

I wrote:

>> (As an aside, last time I looked at this was a few months ago, and I swear 
>> it was behaving properly then—i.e., that the derived attribute was 
>> immediately visible.)

Clearly I imagined that.


-- 
Paul Hoadley
http://logicsquad.net/


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