John Shepherd wrote:
John Shepherd wrote:
2) Does WO seem appropriate for my "hobby project," or would I be
biting off more than a professional programmer could comfortably chew?
Ugh, apologies for two messages so close together, but I meant to
write: "...would I be biting off more than a NON-professional
programmer could comfortably chew?"
Welcome and a suggestion and a coupla caveats. Suggestion first. If
you're interested in not getting a Mac (can't imagine why they're great)
then you could probably pick up an old copy of WebObjects that's
Windows-compatible from eBay or similar. If you do decide to go the Mac
route then a Mini is perfectly adequate for developing WO apps. Just
max out the memory and you'll be fine.
Caveats: Some people think in foreign keys, stored procedures,
declarative SQL, etc. These people have an almost insurmountable
obstacle to learning WO. WO is all about turning the RDBMS artifacts
into Objects so that they play better in the O-O world.
Many people think of a WebObjects EnterpriseObject (or EO) as an RDBMS
table (i.e., one-to-one mapping between EO and table). In this view,
each attribute of the EO corresponds to a column of the table. This
latter view, while not 100% wrong, completely misses the boat. An EO is
intended to provide a more natural representation for the data than a
simple EO-to-table mapping would provide. So, an EO can be a subset of
the rows in a table and is often a subset of the columns of a table.
In this vein, you should really start with your Objects and use EO to
create the RDBMS (at least conceptually). Let's take your hobby project
as a starting point.
You have Song, Artist, RecordLabel, Album. A RecordLabel has the
attributes name, catalog (the collection of all the albums they have the
rights to), maybe artists (the artists they do business with). Song has
title, and album it appears on. Artist has name, albums.
How the preceding looks in an O-O world is somewhat different than how
it appears in the RDBMS. WebObjects bridges that gulf.
Personally speaking, I love developing with WO. It feels more natural
than many of the alternatives I've tried (ColdFusion, Perl, J2EE, C).
-arturo
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