For those interested: part of the answer can be found in the
http://groups.google.com/group/turbogears/browse_thread/thread/75e2b4862df6b4b6/1e526864ae0d04a7?hl=en#1e526864ae0d04a7
thread
On Nov 12, 7:12 pm, SmokeyD <[EMAIL PROTECTED]> wrote:
> Hey people.
> Sorry I ask this question here, it is mainly concerned with
> Toscawidgets, but also with Elixir and the interaction between the
> two, so I though that this would be the best place to ask.
> Suppose I have the setup below with Turbogears 1.1,
> Elixir,Toscawidgets and Genshi.
>
> Three model entities: Organization, Province and Country. An
> organization has a province and a province has a country.
> Now I want to setup one Organization form with toscawidgets, where
> there are SingleSelectFields for country and province.
> How do I ensure that these singleselectfields have the correct option
> selected?
>
> Overriding the __eq__ method on the Province Entity fixed the problem
> for the province field.
> So when I pass an existing Organization instance to the form, the name
> textfield and province singleselectfield contain the correct values,
> but the country singleselectfield does not.
> And indeed, how should ToscaWidgets know that the
> organization.location.country singleselectfield value should actually
> be retrieved from the organization.location.province.country value in
> the Entity.
>
> And in the same line: How can I change the options available to a
> widget in the Root.edit() method?
> The thing is that I want the province field of the form to contain the
> options (provinces) for the correct country.
> I have setup the form with a CascadingSingleSelectField (tw.dynforms)
> for country instead of a SingleSelectField, so that when the country
> is changed in the form, the options for the Province field get
> updated.
> But how do I change the initial options in the field from inside the
> controller?
>
> Hope someone can help.
> Cheers,
>
> Dolf.
>
> -----------------------------------------------
> # file: model.py
> from elixir import *
>
> class Country(Entity):
> name=Field(Unicode)
>
> class Province(Entity):
> name=Field(Unicode)
> country=ManyToOne('Country')
> def __eq__(self,other):
> #yes this can be way more compact, I know
> if type(other)==type(self) and other.id==self.id:
> return True
> elif other==self.name:
> return True
> elif type(other)==str or type(other)==int:
> try:
> if int(other)==self.id:
> print self.id
> print "same id"
> return True
> else:
> return False
> except ValueError:
> return False
> else:
> return False
>
> class Organization(Entity):
> name=Field(Unicode)
> province=ManyToOne('Province')
>
> ---------------------------------------------
> #file: controller.py
> from tw.forms import *
> from model import *
> class OrganizationWidgets(WidgetList):
> name=TextField(validator=NotEmpty)
> province=SingleSelectField(options=[(p.id,p.name) for p in
> Province.query.all()])
> country=SingleSelectField(options=[(c.id,c.name) for c in
> Country.query.all()])
>
> organizationform=TableForm(fields=OrganizationWidgets())
>
> class Root(controllers.RootController):
> @expose("someform")
> def edit(self,id):
> return {'data':Organization.get(id),'form':organizationform}
>
> @expose()
> @validate(addorganizationform)
> @error_handler(edit)
> def save(self,**kw):
> return "whatever"
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