[Zope3-Users] clearing grouped widgets in z3c.form

[John]

In modifying the formdemo/addressbook example to use groups, I found 
that fields in groups are not cleared to their default values when the 
Done or Delete button is pressed in the editform, resulting in an 
addform with values from the previous editform.  Fields that are not in 
groups are cleared (as in the original example, which had no groups); 
only fields in groups have this problem.  How can I fix this?  And more 
generally, how are widgets cleared?

Relevant code is attached.  The editform class is below.

thanks!

-------
class CarEditForm(group.GroupForm,form.EditForm):
  form.extends(group.GroupForm,form.EditForm)
  noChangesMessage = None
  fields = field.Fields(ICar).select('nPassengers')
  groups=(carGroup1,)
  prefix = 'car.edit.'
  @button.buttonAndHandler(u'Delete')
  def handleDelete(self, action):
    # Delete the item from the address book
    item = self.getContent()
    addressbook = item.__parent__
    del addressbook[item.__name__]
    # Reset the selected item
    ISession(self.request)[SESSION_KEY]['selectedItem'] = None
  @button.buttonAndHandler(u'Done')
  def handleDone(self, action):
    # Reset the selected item
    ISession(self.request)[SESSION_KEY]['selectedItem'] = None
-------

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<configure
	xmlns="http://namespaces.zope.org/zope"
	xmlns:browser="http://namespaces.zope.org/browser"
	xmlns:z3c="http://namespaces.zope.org/z3c"
	i18n_domain="addressbook"
	>

	<z3c:template
		template="addressbook.pt"
		for=".browser.AddressBook"
		layer="z3c.formdemo.layer.IDemoBrowserLayer"
		/>

	<browser:zrt-resource
		name="addressbook.css"
		file="addressbook.css"
		layer="z3c.formdemo.layer.IDemoBrowserLayer"
		/>

	<browser:viewlet
		name="addressbook.css"
		view=".browser.AddressBook"
		manager="z3c.formdemo.skin.ICSS"
		class=".browser.AddressBookCSSViewlet"
		permission="zope.Public"
		layer="z3c.formdemo.layer.IDemoBrowserLayer"
		weight="1000"
		/>

	<browser:zrt-resource
		name="text-shadow.js"
		file="text-shadow.js"
		layer="z3c.formdemo.layer.IDemoBrowserLayer"
		/>

	<browser:viewlet
		name="text-shadow.js"
		view=".browser.AddressBook"
		manager="z3c.formdemo.skin.IJavaScript"
		class=".browser.TextShadowViewlet"
		permission="zope.Public"
		layer="z3c.formdemo.layer.IDemoBrowserLayer"
		/>

	
	<class class=".classes.Car">
		<allow interface=".interfaces.ICar" />
		<require
			permission="zope.Public"
			set_schema=".interfaces.ICar" />
		</class>

	<z3c:pagelet
		name="car.html"
		for="zope.app.container.interfaces.IContainer"
		class=".browser.AddressBook"
		layer="z3c.formdemo.layer.IDemoBrowserLayer"
		permission="zope.Public"
		/>

	<adapter
		factory=".browser.AddCarLabel"
		name="title" />

	<utility
		provides="zope.app.schema.vocabulary.IVocabularyFactory"
		component=".vocabulary.carsInParent"
		name="allCars"
		/>
  
  </configure>
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