You are probably experiencing a ValidationError in the .validate() method of
your "language" field. This is probably because TextLine expect the values
to be unicode whereas the vocabulary in your widget has (8-bit) string
values ("voc = SimpleVocabulary.fromItems([('de','German'),
('en','English')])".
Maken Seteva wrote:
>
> Hi!
> I'm having serious problems with getting a selectwidget/
> dropdownwidget working..
> What I want to do is to add a widget for the language field of a
> MessageCatalog.
> Btw, a snippet from the interface (in zope.app.i18n.messagecatalog):
>
> class IMessageCatalog(Interface):
> #...
> language = TextLine(
> title=u"Language",
> description=u"The language the catalog translates to.",
> required=True)
> #...
>
>
> I already have an add view working but instead of manually filling in
> 'en' for english,
> 'de' for german, etc. I now have a widget that generates this:
>
> <select>
> <option value="en">English</option>
> <option value="de">German</option>
> <option ...etc
>
>
> But the thing is, I keep getting "Language: Object is of wrong
> type." displayed to me
> when I click the add button (i.e no system error). Here's the code:
>
> -------------------------------------
> class MessageCatalogAddForm(AddForm):
> form_fields = Fields(IMessageCatalog)
> label = _(u'Add message catalog')
> form_fields['language'].custom_widget = LanguageDropDown
>
> def create(self, data):
> msgcat = MessageCatalog(data['language'], data['domain'])
> return msgcat
>
> -------------------------------------
> class LanguageDropDown(DropdownWidget):
>
> def __init__(self, field, request):
> # Simple test to begin with, will use locale when i get this working..
> voc = SimpleVocabulary.fromItems([('de','German'),
> ('en','English')])
> super(LanguageDropDown, self).__init__(field, voc, request)
>
> # Display the readable version, German & English instead of de
> & en
> def textForValue(self, term):
> return term.value
>
>
> -----------------------------------------
>
> I think I'm missing something or doing something wrong in
> LanguageDropdown.__init__
>
> Where does the constraint get checked for this Widget? I keep getting
> "Object is of wrong type" but i can't
> find in what function this is generated.
>
>
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