On Dec 25, 2007, at 1:13 PM, Adrian Klaver wrote:
>> Well, it's actually in the bizobj/cursor combo, but that's not an
>> important distinction here.
>
> So the data I am seeing in the form elements are an illusion?
>
> If the data lived solely in the bizobj then form_element.update()
> would be
> unnecessary as the element would always reflect the current state
> of the
> bizobj.
By "data" I mean an organized set of rows of information, not any
one piece. In VFP terms it would be called a 'cursor'; in Dabo terms
it's a 'DataSet'. But I think you're getting hung up on semantics;
I'm trying to explain the way that data is handled in Dabo so that
you can use that knowledge to understand how your app is working better.
> My sequence of operations is
> bizobj.save()-->bizobj.requery(()-->self(form).update().
> It is not not until I do the update() that I see the non-Dabo change.
Where is this code being written/run from? I'll assume it's the
form; in that case you should be calling:
self.save()
self.requery()
...and all the associated update stuff is handled for you. Because
you're calling directly to the bizobj layer, which doesn't have any
'knowledge' of UI controls, of course you're not seeing the UI
updated. Calling bizobj.requery() means: tell the bizobj to get the
latest copy of data from its DataSource. Calling form.requery()
means: tell the bizobj to requery(), and then tell the controls to
get the latest copy from their DataSource.
But this goes back to what I was saying above: that the data exists
in the bizobj's cursor. Once you call bizobj.requery(), the non-Dabo
change is present in the bizobj's DataSet. But because you are not in
the UI layer, of course the UI won't show it yet.
-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com
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