How could I render just the form from an autoform? - plone

Question

I'm in the context of a BrowserView. I want to render a form inside the page.
class CommandeView(BrowserView):
...
def render_myform(self):
livraison_form = LivraisonForm(self.context, self.request)
livraison_form.update()
return livraison_form.render()
class ILivraisonForm(interface.Interface):
livraison = schema.Choice(title=_(u"Mode de livraison"),
vocabulary=livraison_vocabulary)
class LivraisonForm(AutoExtensibleForm, form.EditForm):
schema = ILivraisonForm
class LivraisonFormAdapter(object):
component.adapts(ICommande)
interface.implements(ILivraisonForm)
def __init__(self, context):
self.context = context
self.livraison = self.context.livraison
I would like render_myform to render only the form but it return a HTML Plone page.
Any tips are welcomed.

Answer 1

Haven't checked this in-depth, but the form is probably wrapped by the plone FormWrapper class.
Look for a .form attribute on the LivraisonForm instance:
def render_myform(self):
livraison_form = LivraisonForm(self.context, self.request).form
livraison_form.update()
return livraison_form.render()
It may be you need to add an additional interface to the request for this to work (the wrapper normally does this for you. I'm a little low on time right now, so you get this untested:
from plone.z3cform import z2
class CommandeView(BrowserView):
def render_myform(self):
z2.switch_on(self) # Apply layer interface, set up locale, add `getURL` method
livraison_form = LivraisonForm(self.context, self.request).form
livraison_form.update()
return livraison_form.render()
The Plone Knowledgebase uses this same setup to show a form in a viewlet.