On 23/12/2007, at 2:10 PM, Adam Yocum wrote:
Hi Ari,
How can I execute an arbitrary query like the SHOW query to get the
map of property names and default values, I like that idea, I just
don't know how to get a plain query to execute with just a client
app. The client has not db driver lib. Can I use Cayenne to
execute an arbitrary query?
http://cayenne.apache.org/doc/sqltemplate-query.html
But if you can hardcode the choices of default values to just a few
options (such as in the code you posted), then you will not need this.
Since the method for setting defaults in the db is the same accross
the database depending only on field type I can put together
something like the following to initialize objects following our
rules... still it does not work ROP :( PersistentObject used for
client seems to have no way to access the metadata like
CayenneDataObject does, i.e. no getObjEntity()
Yeah, anything you do with this will need to be server side, not in
the client. But lifecycle events work only on the server anyway, and
only once you've committed the object from the client. The code you
posted could go into the common superclass for your persistent objects
on the server. Catch the lifecycle event (either preUpdate or
prePersist) and fire off your code.
http://cayenne.apache.org/doc/lifecycle-callbacks.html
Ari Maniatis
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