We had a problem with MPS a day ago. Unlike most Tapestry components,
MPS does not push the list back during the rewind. It takes pulls the
list in during rewind, populates it and that's it. So, if you don't do
something with the list after the rewind it will be lost at the end of
the request.
We had something like this (Tap3 notation):
Note the page setup is a but unusual but it helped track down the problem.
private List list;
public List getList() {
if (list == null)
return new ArrayList();
return list;
}
public void setList(List list) {
this.list = list;
}
<span jwcid="@contrib:MultiplePropertySelection"
model="--our model---"
selectedList="ognl:list">
We noticed that setList() was never being called. Looking into the
code of MPS we saw that indeed the component never pushes the list
back out.
the fix for us was to delete setList() - never called and change getList() this:
public List getList() {
if (list == null)
list = new ArrayList();
return list;
}
in the old version of getList() nobody had a reference to the new
ArrayList() and list was always null.
Hope that helps a bit.
Geoff
On 2/3/06, Chris Chiappone <[EMAIL PROTECTED]> wrote:
> Here is what I have that seems to work.
>
> page.html
>
> <span jwcid="@contrib:MultiplePropertySelection"
> model="ognl:@[EMAIL PROTECTED]"
> selectedList="ognl:appList">
>
> page.java
>
> public static IPropertySelectionModel APPTYPES = new
> StringPropertySelectionModel(
>
> SelectionModelBuilder.getAllApplicationTypeNames(false));
>
>
> public abstract List getAppList();
>
> public abstract void setAppList(List appList);
>
> public void pageBeginRender(PageEvent event) {
>
> if (getAppList() == null) {
> setAppList(new ArrayList());
> }
>
> }
>
> On 2/3/06, Adam Zimowski <[EMAIL PROTECTED]> wrote:
> > I commented out setting list to null in initialize and still have same
> > problem. I set it to null in initialize so that when page is returned to
> > pool the state is clean. I tried looking for a good quick working example,
> > but can't find it anywhere.
> >
> > On 2/3/06, Chris Chiappone <[EMAIL PROTECTED]> wrote:
> > >
> > > I think it has to do with the fact you are setting the selectedList to
> > > null in initialize.
> > > So during form rewind its actually gettting reset.
> > >
> > > On 2/3/06, Adam Zimowski <[EMAIL PROTECTED]> wrote:
> > > > Hi. I'm a tapestry newbie... I'm trying to implement a group of
> > > checkboxes
> > > > where at least one option is required. I'm thinking of using
> > > > MultiplePropertySelection from contib library, but I can't find a good
> > > > example of it working. I tried based on the basic documentation, and
> > > while I
> > > > got the group of checkboxes to render based on my
> > > IPropertySelectionModel
> > > > when I submit the form any checkbox selections I made are not
> > > remembered:
> > > >
> > > > <component id="test" type="contrib:MultiplePropertySelection">
> > > > <binding name="selectedList" value="selectedList"/>
> > > > <binding name="model" value="model"/>
> > > > </component>
> > > >
> > > > ------ relevant part from Page class:
> > > >
> > > > private List<CheckboxEntity> selectedList;
> > > > public abstract List<CheckboxEntity> getSelectedList();
> > > > public abstract void setSelectedList(List<CheckboxEntity> aList);
> > > >
> > > > public void initialize() {
> > > > if(_pLog.isDebugEnabled()) _pLog.debug("");
> > > > selectedList = null;
> > > > }
> > > >
> > > > public IPropertySelectionModel getModel() {
> > > > _pLog.debug("");
> > > > return new SimpleEntitySelectionModel();
> > > > }
> > > >
> > > > The SimpleEntitySelectionModel connects to the database and retrieves
> > > > checkbox info. It works in that I see checkboxes render based on what's
> > > in
> > > > the database.
> > > >
> > > > Perhaps anybody has a quick practical example of the whole thing?
> > > >
> > > > Regards,
> > > > Adam Zimowski
> > > >
> > > >
> > >
> > >
> > > --
> > > ~chris
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> > >
> >
> >
>
>
> --
> ~chris
>
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