> I'm quite new to pyramid and deform and I'm trying to achieve
> something very simple that I suppose should work OOTB but I can't get
> it working.

> I have a simple schema-based form and I want the fields to get the
> selected value from the request once submitted.

> Here's the schema:

> class MySchema(colander.MappingSchema):
>     department = colander.SchemaNode(
>                     colander.String(),
>                     default='',
>                     widget=SelectWidget(values=departments),
>                     )

> where choices come from an external db trough sqlalchemy. The form
> works but on every submit it lose selected value.

> So, I tried the deferred approach [1] like this:

> @colander.deferred
> def deferred_choices_widget(node, kw):
>     choices = kw.get('choices')
>     return SelectWidget(values=choices)

> @colander.deferred
> def deferred_default(node, kw):
>     return kw['request'].POST.get('department')

> class MySchema(colander.MappingSchema):
>     department = colander.SchemaNode(
>                     colander.String(),
>                     default=deferred_default,
>                     widget=deferred_choices_widget,
>                     )

> I noticed that the request was not in 'kw' so I binded it to the schema:

> schema = schema.bind(choices=departments,
>                              default=default,
>                              request=self.request)

> Now I see the value into deferred_default call and I can get it using
> `kw['request'].POST.get('department')` but there is no way to get it
> into the form on reload after submit.

> I can't find any meaningful step in the docs... what am I missing?

> Versions: colander-0.9.8-py2.7,  deform-0.9.5-py2.7, pyramid-1.3.3-py2.7

> Thanks,
> SimO

> [1] http://deformdemo.repoze.org/select_with_deferred/