Hi David, On 30/03/2012, at 4:11 AM, David Holt wrote:
> On 2012-03-29, at 8:51 AM, Ramsey Gurley wrote: > >> >> On Mar 29, 2012, at 2:31 AM, Paul Hoadley wrote: >> >>> Anyway, the subject above is probably a misnomer: I'm not trying to create >>> particularly complex objects, but I am trying to do something outside CRUD, >>> which is pretty much all I've ever done with D2W before. In the model, a >>> Billable object has an optional to-one relationship to Invoice. When I >>> create a Billable, it initially has no related Invoice. Later I will >>> create an Invoice for a client, and collect together some set of Billables, >>> and the relationship is created at that time. And that's the bit I need a >>> pattern for: Invoice creation. Billable also has a mandatory relationship >>> to Practice (i.e., a client), and a startTime timestamp. When I go to >>> create an Invoice, I'd give the Invoice a date and select a Practice, and >>> then I want to add, say, all of the Billables that (a) belong to no other >>> Invoice, (b) point to the same Practice, and (c) have a startTime that >>> falls before the new Invoice.date. >> >> Well, you can just set the practice, the invoice date, and then save >> changes. In Invoice.willInsert() fetch the billables and add them to the >> relationship just before the save takes place. :-) Or is that too automatic? > > I would probably do it in my Invoice init() method. > > Get the practice from thread storage (assuming you select it somehow and can > save it in thread storage at that point) > Set the date to current time > Fetch billables that match your criteria > Set the relationship to billables. Yeah, OK, and then the billables relationship would be editable before I save the Invoice. Now, humour me—give me an example of how I can "select it somehow and save it in thread storage". :-) > Profit? :-) Here's hoping. -- Paul Hoadley http://logicsquad.net/
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