Christian Robottom Reis
kiko at async.com.br
Tue Oct 28 12:55:40 BRDT 2003
On Tue, Oct 28, 2003 at 10:49:30AM +0000, Alessandro Bottoni wrote:
> I have to say that you did a huge and wonderful job, guys! Kiwi looks
> fantastic! Congratulations!
Thanks, it's appreciated.
> 1) I'm thinking to use Kiwi to develop a GUI for a PGSQL database. Of course,
> I will need a Kiwi Model (and maybe a Kiwi Proxy) for accessing my PGSQL DB
> (through the Python's DB Abstraction Layer).
Well, you don't *need* to use the Model unless you want notifications
replicated from your domain object to the interfaces. IOW, the Model is
what does the model -> view update, which really makes sense when:
- You are doing concurrent writes to the same object and want to
make sure the UI is up to date.
- You have multiple views rendering the same object.
The Model has something of a performance penalty because of all the
setattr() code, but I that can be improved by selectively activating
> Can I simply derive a new class from Kiwi.Framework.Model and write my own
> "load" and "save" methods into it for reading/writing from/to my database?
> Does this approach could break any magic of Kiwi? Have I to take into account
> any other element to be on the safe side? Can I use the PickledModel class as
> an example?
Well, if you really want to use a an SQL database, I would recommend
looking into Ian Bicking's SQLObject, which offers a complete
object-relational mapper for PostgreSQL. You can then use Model as a
mixin for SQLObject -- I have a co-worker here that uses that in one of
our projects, and it works well -- and very fast.
> 2) Most likely, someone else have faced this problem already. Do you know of
> any existing RDBMS (open source) application that uses Kiwi for building its
> user interface? Is there any sample code or any documentation around
> regarding this kind of data-centric applications?
Apart from the app I said (which unfortunately is a client project) I
*think* Andreas has something with SQLObject implemented as well.
Unfortunately, I don't know of any OSS projects that depend on Kiwi and
use an SQL database today -- in part, it's because we don't support GTK2
yet, and most OSS projects are intent on following the bleeding edge.
It's been on my TODO for a while now, I've just been too damned busy!
Christian Robottom Reis | http://async.com.br/~kiko/ | [+55 16] 261 2331
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