Displaying attributes derived from relationships in D2W
Displaying attributes derived from relationships in D2W
- Subject: Displaying attributes derived from relationships in D2W
- From: Steve Sharman <email@hidden>
- Date: Tue, 27 Jan 2004 01:45:10 +0000
Dear all,
Apologies for boring you with yet another simple question. I'm finding
learning WebObjects both intensely rewarding, and intensely frustrating
at the same time
I have two EO entities, Person and EmailAddress. I have a relationship:
Person <-->> EmailAddress
which in Person is called emailAddress. What I want to be able to do is
to modify the Person List page in D2W in order to display the email
addresses for the selected Persons in the list. When I start the
Assistant to modify the Person List page, I select the "Properties"
tab, which appears as it is shown in the Apple documentation. I can see
the +emailAddress relationship in the left hand column. What I'm
expecting to be able to then do is click on that, and see the
attributes and relationships of the entity pointed to in the next
column along - and I don't see this. All I see is what looks like a set
of functions - +@avg, +@count, and so on. No attributes or
relationships - although if I click one of these, I can then see the
attributes and relationships that I would expect - which is fine if I
want to count them, and not if I want to display them! This is the case
for to 1-M relationships. 1-1 (or back link of M-1) relationships seem
to work as advertised.
If I then try entering the relationship manually (I'm guessing my way
through by this point) by entering emailAddress.pemEmailAddress into
the "Pick Properties To" text box, I can then click the right arrow to
insert the property into the Show list. It comes into the list with a
default association to a "D2WKeyPathContainer". I can change this to
D2WDisplayString, and if I do the list page displays fine, but with ()
in the EmailAddress column.
I'm sure that as usual I'm making a silly mistake or misunderstanding
what I should be doing - can anyone make any suggestions as to what I
should be looking at?
Many thanks,
-- Steve
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