At 12:23 PM -0800 3/20/99, Patrick Robinson wrote:
> A week or so ago, David Neumann wrote, in response to Bob Stuart:
>
>> This is a matter of taste and trade-offs. I don't care if the DG isn't
>> in synch. Next time my users access the app the page they get back will
>> be in synch. Should they ever try to make a state change to the
>> database, EOF makes sure everything's in synch and that nothing changed
>> under me. I am ensured that I can synch up just-in-time.
>
> I'm not sure I understand what this means... Let's say I have a DG
> that's displaying an array of items. And I have a link (or button)
> on this page that does two things: (1) adds a new item via the DG's
> insert method, and (2) takes the user to a page to edit the new EO's
> attributes. On this second page, he can Save or Cancel the addition
> of the new item.
< weird, annoying behaviors with the traditional WO Component Wizard
editing metaphor deleted>
Ah, someone else who doesn't like the way that the WO wizards do things.
You want the more traditional UI metaphor: New brings up a dialog
box which you fill in and click save.
This is how _I_ did that, I'm not sure its the best way.
When you go to the new page, all you have to do is allocate a new
object of whatever type:
Person *personEdit;
- awake
{
personEdit = [[Person alloc] init];
// you can fill in defaults here
}
All of your page stuff is then linked to personEdit rather then
displayGroup.selectedObject.
In your save button:
- savePerson
{
[[[self session] defaultEditingContext] insertObject: personEdit];
[self.session.defaultEditingContext: saveChanges];
}
Translation:
You can make objects that exist independently of the database. In
the "New item, but don't insert into the database until confirmation"
case, that's what you want. So in -awake, you make yourself a new
object.
Then [[[self session] defaultEditingContext] insertObject: personEdit];
Tells EO that said object should be added to the database, along
with any objects it points to.
What I'm not sure of:
If I need a:
- sleep
{
[personEdit release];
}
I think I don't need it in WebScript (what I'm using), but you do in ObjC.
Pierce
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Pierce T. Wetter III, Director, Twin Forces, Inc.
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