[Seaside] Glorp-Seaside-callback not Working
Rajeev Lochan
lochan94 at gmail.com
Mon Aug 13 16:05:51 UTC 2007
Thanks Ron and Alan, I shall try to implement what you have suggested and
comeback to you when done( commit) or having problems again(Rollback) ;-)
On 8/13/07, Alan Knight <knight at acm.org> wrote:
>
> In general, if you have a unit of work in progress, then any objects you
> read during that unit of work will be registered automatically. Registering
> more than once should do no harm, as long as the object was registered
> before it was modified.
>
> I don't know why you would be having that particular problem, but I don't
> know exactly what the methods commit: and and the callback does. It would
> depend on the flow of control. If seaside is blocking, then the unit of work
> won't have committed, so I would expect the changes to be seen. However, if
> Seaside lets your process keep going when you register the callback, then
> presumably it will have already fallen through, and committed the unit of
> work before any changes were made.
>
> So you'd need to either be using Seaside API's that "block" the calling
> process. Or you'd need to begin the unit of work here, and commit it
> explicitly later. So, for example, I think it might work if you put the call
> to commit the unit of work in the callback for the submit button. Although
> you might have to do some fiddling in case it gets called more than once due
> to continuations or other mechanisms.
>
> At 12:53 PM 8/12/2007, Rajeev Lochan wrote:
>
> Hi Ron,
> I tried to implement what you hinted, no progress.
>
> I changed my code to
>
> html
> form: [self session
> commit: [temp := self session
> readOneOf: BlogPost
> where: [:each | each persistentId = '1'].
> self session register: temp.
> html textInput value: temp title;
>
> callback: [:value | temp title: value].
> html submitButton
> callback: [self session register: temp];
> text: 'Update']]
>
>
> I am registering before change as you said, but doesnt change the title.
> (I am registering twice though)
>
>
> But, even if I dont register the object, before changing. It does update
> if I use normal setter technique. (Snippet below)
>
> html
> form: [self session
> commit: [temp := self session
> readOneOf: BlogPost
> where: [:each | each persistentId = '1'].
> temp title: 'some Title'.
> html submitButton
> callback: [self session register: temp];
> text: 'Update']]
>
>
>
>
> In Glorp Tutorial by Roger Whitney, he updated in just unitOfWork and also
> without registering it.
>
> " A UnitOfWork will keep track of the changes we make in objects. The
> following will retrieve a
> person, change the first name of person and then write the changes back to
> the database.
>
> session beginUnitOfWork.
> foundPerson := session readOneOf: Person where: [:each | each firstName =
> 'Jose'].
> foundPerson firstName: 'RamJet'.
> session commitUnitOfWork
>
> When we start a UnitOfWork it records all the objects we read from the
> database. When the
> UnitOfWork is committed it writes all the changed objects back to the
> database."
>
>
> As much I understand, it has something to do with
> self session commit:[ ........... html textInput value: callback:
> ...........]
>
>
> BTW, I am not using Magritte in my proposed application. So Ramon's Active
> Record for Magritte would possibly not help me much.
>
> Thanks in advance.
>
>
> On 8/12/07, *Ron Teitelbaum* <Ron at usmedrec.com
>
> > wrote:
>
> Hi Rajeev,
>
>
>
> You need to register the object before you make changes to it. The
> registration tells Glorp to track changes to your object.
>
>
>
> Hope that helps!
>
> Ron Teitelbaum
>
>
> ------------------------------
> From: seaside-bounces at lists.squeakfoundation.org [mailto:seaside-bounces at lists.squeakfoundation.org<seaside-bounces at lists.squeakfoundation.org>]
> On Behalf Of Rajeev Lochan
> Sent: Sunday, August 12, 2007 11:52 AM
> To: Seaside - general discussion
> Subject: [Seaside] Glorp-Seaside-callback not Working
>
>
>
> Dear Seasiders,
> I followed Ramon's Blog of porting seaside to postgreSQL using Glorp.
> I have now created 2 components. In one, you can enter the details of the
> form (which are in the form of textInput and textArea) and are registered
> upon submitting a button. This part works well.
>
> Now, in the second component, I want to edit(update) the entries I have
> created earlier. I use textInput and textArea again for this, and when I
> edit and submit using a button (register the model) , the update doesnt seem
> to work.
>
> I have observed one thing here, the update doesnt seem to work in
> textInput value: callback:
>
> A snippet is code is here.(which doesnt update the title)
>
>
> self session
> commit: [temp := self session
> readOneOf: BlogPost
> where: [:each | each title = '1'].
> html textInput value: temp title;
> callback: [:value | temp title: value].
> self session register: temp]
>
>
>
> A snippet which uses simple setter technique and is updated.
>
> self session
> commit: [temp := self session
> readOneOf: BlogPost
> where: [:each | each title = '1'].
> temp title: 'some Title'.
> self session register: temp].
>
>
>
> Anticipating your help
>
>
>
>
> --
> Rajeev Lochan
>
> Co-founder, AR-CAD.com
>
> http://www.ar-cad.com
> +91 9243468076 (Bangalore)
> 080 65355873
>
> _______________________________________________
> Seaside mailing list
> Seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside <http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside>
>
>
>
>
> --
> Rajeev Lochan
>
> Co-founder, AR-CAD.com
>
> http://www.ar-cad.com
> +91 9243468076 (Bangalore)
> 080 65355873
> _______________________________________________
> Seaside mailing list
> Seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
> --
> Alan Knight [|], Cincom Smalltalk Development
> knight at acm.org
> aknight at cincom.com
> http://www.cincom.com/smalltalk
>
> _______________________________________________
> Seaside mailing list
> Seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>
>
--
Rajeev Lochan
Co-founder, AR-CAD.com
http://www.ar-cad.com
+91 9243468076 (Bangalore)
080 65355873
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