I agree that it is *easier*, but I got bored by duplicating my domain model
in a DTO like structure. And that's cumbersome.
I saw this hapening in several projects, and in the end we had two almost
equals object structures, one with rich behavior, and one with just data and
structure.
that's sad.... or not?
2008/2/11, Igor Vaynberg <[EMAIL PROTECTED]>:
>
> well, you will have to disconnect the hibernate session, and store it
> in the http session - or some other place. then your model would have
> to reconnect the session and pull the entity out of it. its much
> easier to create a bean imho.
>
> -igor
>
>
> On Feb 11, 2008 12:13 AM, Martijn Lindhout <[EMAIL PROTECTED]>
> wrote:
> > because I use the domain objects directly,. without any DTO's, I have to
> use
> > the long conversation pattern. That means I have to store the domain
> object
> > somewhere in the session and let the loadabledetachable model retrieve
> it
> > from there?
> >
> > 2008/2/11, Igor Vaynberg <[EMAIL PROTECTED]>:
> >
> > >
> > > then you have to use a bean, and on confirm apply changes from the
> > > bean to the persistent entity. the only other alternative i know of is
> > > to use the long conversation pattern which i am not really a fan of.
> > >
> > > -igor
> > >
> > >
> > > On Feb 10, 2008 11:25 PM, Martijn Lindhout <[EMAIL PROTECTED]>
> > > wrote:
> > > > ok, that makes sense.
> > > >
> > > > But what if I have a Hibernate persisted entity that I want to edit
> in
> > > > multiple actions? Say I have an order with orderlines, and I want to
> add
> > > and
> > > > remove them at will, and in the end save or rollback all the
> changes? I
> > > > don't want the intermediate add and removes propagate directly to
> the
> > > > database, only at 'confirm'.
> > > >
> > > >
> > > > 2008/2/9, Igor Vaynberg <[EMAIL PROTECTED]>:
> > > > >
> > > > > the other constructor i presume is getting a persistent entity? so
> > > > > hibernate/jpa will flush state back to db at the end of request,
> thats
> > > > > why that works.
> > > > >
> > > > > -igor
> > > > >
> > > > >
> > > > > On Feb 9, 2008 11:08 AM, Martijn Lindhout <
> [EMAIL PROTECTED]>
> > > > > wrote:
> > > > > > ok, thanx, that seems to work.
> > > > > >
> > > > > > And what about the other constructor, when editing an existing
> > > entity?
> > > > > >
> > > > > > 2008/2/9, Igor Vaynberg <[EMAIL PROTECTED]>:
> > > > > >
> > > > > > >
> > > > > > > setModel(new CompoundPropertyModel(new
> LoadableDetachableModel(){
> > > > > > >
> > > > > > > ^ that is bad because ldm is cleared between requests, thats
> why
> > > its
> > > > > > > called loadable
> > > > > > >
> > > > > > > just do this
> > > > > > >
> > > > > > > setModel(new CPM(new Employee()));
> > > > > > >
> > > > > > > -igor
> > > > > > >
> > > > > > >
> > > > > > > On Feb 9, 2008 10:45 AM, Martijn Lindhout <
> > > [EMAIL PROTECTED]>
> > > > > > > wrote:
> > > > > > > > Hi,
> > > > > > > >
> > > > > > > > I have a page, with those two constructors, the first for
> > > editing a
> > > > > new
> > > > > > > > employee, the second for editing an existing.
> > > > > > > >
> > > > > > > > public EditEmployee() {
> > > > > > > > setModel(new CompoundPropertyModel(new
> > > > > > > LoadableDetachableModel(){
> > > > > > > > protected Object load() {
> > > > > > > > return new Employee();
> > > > > > > > }
> > > > > > > > }));
> > > > > > > > init();
> > > > > > > > }
> > > > > > > >
> > > > > > > > public EditEmployee(final Long id) {
> > > > > > > > setModel(new CompoundPropertyModel(new
> > > > > > > LoadableDetachableModel(){
> > > > > > > > protected Object load() {
> > > > > > > > return empRepository.getEmployee(id);
> > > > > > > > }
> > > > > > > > }));
> > > > > > > > init();
> > > > > > > > }
> > > > > > > >
> > > > > > > > Because the Employee info is relatively much, I separate it
> in
> > > two
> > > > > > > panels in
> > > > > > > > a tabpanel. The hierarchy is: Page <- Form <- TabbedPanel <-
> > > several
> > > > > > > Panels
> > > > > > > > The problem is, that when I enter the formfields on the
> panels,
> > > they
> > > > > got
> > > > > > > > valided, but then a new Employee instance is created, and
> the
> > > > > > > FormComponent
> > > > > > > > values are not copied to the newly instantiated Employee.
> > > They're
> > > > > null.
> > > > > > > >
> > > > > > > > I did some tests and it appears that on each panel switch,
> the
> > > > > > > Model.load is
> > > > > > > > called, and a new Employee is returned.
> > > > > > > >
> > > > > > > > What's going wrong here....
> > > > > > > > --
> > > > > > > > Martijn Lindhout
> > > > > > > > JointEffort IT Services
> > > > > > > > http://www.jointeffort.nl
> > > > > > > > [EMAIL PROTECTED]
> > > > > > > > +31 (0)6 18 47 25 29
> > > > > > > >
> > > > > > >
> > > > > > >
> > > ---------------------------------------------------------------------
> > > > > > > To unsubscribe, e-mail: [EMAIL PROTECTED]
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> > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > >
> > > > > > Martijn Lindhout
> > > > > > JointEffort IT Services
> > > > > > http://www.jointeffort.nl
> > > > > > [EMAIL PROTECTED]
> > > > > > +31 (0)6 18 47 25 29
> > > > > >
> > > > >
> > > > >
> ---------------------------------------------------------------------
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> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > Martijn Lindhout
> > > > JointEffort IT Services
> > > > http://www.jointeffort.nl
> > > > [EMAIL PROTECTED]
> > > > +31 (0)6 18 47 25 29
> > > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> > >
> >
> >
> > --
> > Martijn Lindhout
> > JointEffort IT Services
> > http://www.jointeffort.nl
> > [EMAIL PROTECTED]
> > +31 (0)6 18 47 25 29
> >
>
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> To unsubscribe, e-mail: [EMAIL PROTECTED]
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>
>
--
Martijn Lindhout
JointEffort IT Services
http://www.jointeffort.nl
[EMAIL PROTECTED]
+31 (0)6 18 47 25 29
