On Oct 24, 2009, at 7:38 PM, Tavis McDevitt wrote:
Don:
As someone who is learning WO I can honeslty say I would have looked
at your tutorials sooner if I'd known about them. They're a great
addition since the best intro material I've seen so far is Apple's
documentation (I've read all of it and it is still really useful and
conceptual), and you help bridge the gap between thier use of
deprecated tools and WOLips. (When I was done with that Chuck's book
became very useful too.)
Thank you.
I've a question though. In your EoModelerBasics show, you made a to-
one relationship from a Person entity to a Cadency entity (a title,
like Jr or Sr). I get it. You also made the inverse to-many
relationship from Cadency to Person. I don't get that. If I assume
that I will never traverse an inverse relationship (I will never
want to know what people have a Jr in their signature), do I have to
model the inverse relationship? I've been skipping that.
The only reason I did that was to show you could create an inverse
relationship. In this particular instance, in real life, you probably
would not want to make the inverse relationship.
One more question while I'm at it. What's the best way to model a
linked list? I've thought of putting list items in a table with an
inbred relationship that links to other list items. My concern is
that to retrieve the list at once I'd have to have many trips to the
database, because in a single fault I will only know the root item
in the list, and after each succesive fetch will only have a
reference to one more item. I don't know much about stored
procedures; can one be written to fetch the entire list?
I think Chuck may have answered this for you. I am not sure how to do
that, I have not tried it.
Thanks,
Tavis McDevitt
Message: 8
Date: Sat, 24 Oct 2009 14:57:11 -0400
From: Don Lindsay <[email protected]>
Subject: Re: 2009 surveys results
To: undisclosed-recipients: ;
Cc: webobjects Apple <[email protected]>
Message-ID: <[email protected]>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
I agree with Robert, I created several tutorials for WebObjects as
well as an installer for windows and linux. This is something that I
use my spare time to support.
Based on my review of hits to the tutorials, they are rarely
accessed. If they were used more, I would create more of them.
The tutorials I made are available at:
http://web.me.com/pccdonl/tutorials/WoLipsInstall.htm
as is the installer. (I havent updated the installer in a couple
of months)
Don
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