Re: many-to-many design question.
Re: many-to-many design question.
- Subject: Re: many-to-many design question.
- From: "Jonathan Fleming" <email@hidden>
- Date: Tue, 10 Aug 2004 14:30:51 +0100
Can't you somehow link the null value to the ID of metrics they selected so
you know where it's coming from or maybe catch an exception if they select
your value of --none selected--
try something like this in your method
myVar = request().stringFormValueForKey("myVar");
try {
if ( myVar.equals("--none selected--")) {
return myExceptionMethod() /*whatever/wherever this
maybe*/;
}
}
catch (NullPointerException ex) {
myExceptionMsg = "You Cannot Select This"
return context().page()
}
From: James Cicenia <email@hidden>
To: "Jonathan Fleming" <email@hidden>
CC: email@hidden
Subject: Re: many-to-many design question.
Date: Tue, 10 Aug 2004 08:06:59 -0500
Because a null value is acceptable.. which I label as --none selected--.
It is a bit tricky because I have to display the metrics in a repeating
array and then display the popup next to each one.
Everything works great unless they select --none selected-- which nulls out
the value so I can't tell which one it originally was linked to.
Maybe my design is wrong. Maybe might intermediate table should have three
columns in it. Just wondering what anyone else has done with this list of
list issue.
-James
On Aug 10, 2004, at 7:56 AM, Jonathan Fleming wrote:
I don't really understand what you are going on about here but why can't
you simply exclude null values in the popup and they won't get selected
and thus create your problem.
Regards
Jonathan :^)
From: James Cicenia <email@hidden>
To: WebObjects (Group) <email@hidden>
Subject: many-to-many design question.
Date: Tue, 10 Aug 2004 07:47:31 -0500
Hello -
I have a pattern where I have a list of lists. These are called metrics
and their possible values metricValues.
I want to assign a value for each metric to a project. This means that I
have to dynamically show the metric list and then allow the user to
select one value for each of the metric's list of values. I had
originally created a many-to-many relationship to the metricsValue since
that would be theoretically enough as I could always get the selected
values metric. My problem occurs when the user selects a null value in
the popup. Now I don't have a way to find its parent metric anymore.
How do others handle this list of list with a relationship design
problem?
Thanks again,
James Cicenia
_______________________________________________
webobjects-dev mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/webobjects-dev
Do not post admin requests to the list. They will be ignored.
_________________________________________________________________
It's fast, it's easy and it's free. Get MSN Messenger today!
http://www.msn.co.uk/messenger
_________________________________________________________________
Express yourself with cool new emoticons http://www.msn.co.uk/specials/myemo
_______________________________________________
webobjects-dev mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/webobjects-dev
Do not post admin requests to the list. They will be ignored.