Hi Ramsey, On 30/03/2012, at 2:21 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? It's more automatic than I was thinking, but it sounds alright. Say if I wanted to review the list of Billables before saving, though, what would you do then? -- Paul Hoadley http://logicsquad.net/
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