Re: OOP - a question about database access

"Universe" <universe_at_covad.net> wrote in message news:9945e$3fac1163$428681c3$941_at_msgid.meganewsservers.com...
>
> "Bob Badour" <bbadour_at_golden.net> wrote in message
>
> > "Alfredo Novoa" <alfredo_at_ncs.es> wrote in message
>
> > > "Uncle Bob (Robert C. Martin)" <u.n.c.l.e.b.o.b_at_objectmentor.com>
wrote
> in
>
> > "Alfredo Novoa" <alfredo_at_ncs.es> wrote in message
> > > > >Objects like Employee, Customer, etc are completely unnecessary
> > > > >because that entities are already managed by the DBMS. You only
need
> > > > >to map the database tables to visual controls like grids, edits,
etc.
>
> > > > This might be true if the database application does absolutely not
> > > > processing of the data. If there are no business rules, and the
> > > > system does nothing more than add, display, modify, and delete
> > > > records, then having entity objects may not be very useful. On the
> > > > other hand, as soon as you add any business rules, such as field
> > > > validation, or summary reporting, etc. you need a way to separate
> > > > those rules from the database. That's one very useful application
for
> > > > OO.
>
> > > What a pearl!
> > >
> > > Sorry for the crossposting again, but I find things like this
> > > interesting in order to understand the current state of the IT
> > > industry.
> > >
> > > If recognized OO writers show this "understanding" of the data
> > > management issues, imagine the rest.
>
> > Yep, it's widespread and piled high.
>
> While RCM has definite problems, please explain *concretely* why an app
that
> processes *outside* of the dbms would not use separate types?

Please explain how your demand has anything to do with what I wrote.

> Can you guys explain why OO's support for polymorphism is bad, or not
> useful?

Why would I explain anything I never said? Can you explain why the sky is pink?

> Can you explain why using models that are more intuitive for both
> developers and clients should be avoided and disdained.

I don't do that. I encourage the use of the relational model, and I have never disdained it. If you are suggesting that some primitive location-based computational model has usability advantages, please show us your empirical evidence. Received on Sat Nov 08 2003 - 01:48:04 CET