Re: Saving the collection back to the bean using custom binding (was Re: cforms custom binding multivaluefield)

[Jorg Heymans]

Thanks Robin,
I came to a similar solution last night by careful deduction - what a 
way to find out how it works ! :-)

Robin Wyles wrote:
Jorg,
Use widget.getValue() to retrieve the selected values from a widget  
with a selection list.

I do something like this to bind back to the bean:
    <fb:javascript id="projects" path="." direction="save">
          <fb:save-form>
            var values = new Packages.java.util.ArrayList();
            values = widget.getValue();
            var user = jxpathPointer.getNode();
            user.setProjects(values);
          </fb:save-form>
    </fb:javascript>
For for information look at the widget API docs:  
http://cocoon.apache.org/2.1/apidocs/org/apache/cocoon/forms/formmodel/ 
Widget.html

Hope that helps,
Robin
On 22 Sep 2004, at 17:45, Jorg Heymans wrote:
ok in situation below i have
   <fb:load-form>
     var collection = jxpathPointer.getNode();
     widget.setSelectionList(collection, "id", "name");
   </fb:load-form>
to load up the selectionlist.
How do i now save it back to the bean? (i removed the direction  
attribute. Instinctively, i did
   <fb:save-form>
     var collection = widget.getSelectionList();
     jxpathPointer.setValue(collection);
   </fb:save-form>

but my instinct was wrong :-)
Any thoughts? There is so little info on this...
Jorg Heymans wrote:
setting the multivaluefield datatype to integer did the trick. I  
guess it is the "key" (or value - depends how you look at it)  
datatype that matters here, not the label.
Jorg Heymans wrote:

Hi,
I have a bean called "Profile" that populates my form. The bean has  
an arraylist called "targetGroups" which contains "TargetGroup"  
objects. (and get-set methods for this arraylist)
Each Targetgroup object has an id(Integer) and name(String).

i have a multivaluefield widget for these groups
<fd:multivaluefield id="targetgroups">
<!--is this datatype correct???? tried setting it to my TargetGroup  
class but it says unknown datatype -->
  <fd:datatype base="string"/>
  <fd:selection-list/>
</fd:multivaluefield>

I want to populate this multivaluefield with a custom binding
<fb:javascript id="targetgroups" path="targetGroups"  direction="load">
  <fb:load-form>
    var collection = jxpathPointer.getNode();
    widget.setSelectionList(collection, "id", "name");
  </fb:load-form>
</fb:javascript>
I am getting a ClassCastException
Original Exception: java.lang.ClassCastException
        at  
org.apache.cocoon.forms.datatype.convertor.DummyStringConvertor.conve 
rtToString(DummyStringConvertor.java:35)
        at  
org.apache.cocoon.forms.datatype.typeimpl.AbstractDatatype.convertToS 
tring(AbstractDatatype.java:94)
        at  
org.apache.cocoon.forms.datatype.FlowJXPathSelectionList.generateSaxF 
ragment(FlowJXPathSelectionList.java:119)
        at  
org.apache.cocoon.forms.formmodel.MultiValueField.generateItemSaxFrag 
ment(MultiValueField.java:143)
        at  
org.apache.cocoon.forms.formmodel.AbstractWidget.generateSaxFragment( 
AbstractWidget.java:369)
        at  
org.apache.cocoon.forms.transformation.EffectWidgetReplacingPipe$Widg 
etHandler.process(EffectWidgetReplacingPipe.java:390)
        at  
org.apache.cocoon.forms.transformation.EffectPipe.endElement(EffectPi 
pe.java:417)
        at  
org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown  Source)
        at  
org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unkn 
own Source

Thoughts?
Jorg

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