On Wed, Jul 26, 2006 at 06:33:50PM +0200, Carlo Cardelli wrote:
> class IInvoice(Interface):
> invRef = Int(
> title=u"Ref.no",
> description=u"Invoice reference number",
> min=1,
> required=True
> )
> invDate = Date(
> title=u"Date",
> description=u"Invoice Date",
> required=True
> )
> invCust = Object(
> schema=ICustomer,
> title=u"Customer",
> description=u"Customer",
> required=True
> )
> ... other ininfluent fields...
>
>
> Now, I have to render the 'invCust' object as a selection-list showing
> the custNames of all possible Customers, where the user can select the
> appropriate Customer for the Invoice. Editing the Invoice, the
> selection-list should position itself showing the Customer set previously.
> In other words, I need a widget that somewhat behave like
> "Plone.Archetypes.ReferenceWidget".
> I know that this is a very basic problem. Anyone already implemented it?
What you need to do is define the customer field as a choice in the interface:
class IInvoice(Interface):
...
invCust = Choice(title=u"Customer",
vocabulary="Customers")
and define the "Customers" vocabulary, that will list all customers in
your app. Look at zope.schema.vocabulary.SimpleVocabulary.
Albertas
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