Custom AddForm template with Dexterity, on Plone 4 - plone

Question

I'm having problems in getting my Dexterity content type to show a custom Add Form. I have already done this in a previous product, but, amazingly, I cannot accomplish this using Plone 4.1 and plone.app.dexterity 1.0.3
My CrmContact content type, living in package.name.types.contact.py, has its schema defined in this way:
from five import grok
from zope import schema
from zope.interface import implements
from plone.directives import form, dexterity
class ICrmContact(form.Schema):
"""A contact item for the CRM"""
title = schema.TextLine(
title=_(u"Company name"),
)
...
class CrmContact(dexterity.Container):
implements(ICrmContact)
class Add(dexterity.AddForm):
grok.context(ICrmContact)
grok.name('package.name.contacts.types.contact')
grok.template('add')
My template lives in package/name/types/contact_templates. It's a typical template. I know it's not being rendered because it has a dummy node that will call a non existing method using tal:content, in order to raise an exception; so I'm sure the template itself is not the issue.
My content type FTI is registered correctly during installation, and the content type is available and addable.
Finally, in profiles/default/types.package.name.types.contact.xml:
<?xml version="1.0"?>
<object name="package.name.types.contact" meta_type="Dexterity FTI"
i18n:domain="package.name" xmlns:i18n="http://xml.zope.org/namespaces/i18n">
...
<!-- Method aliases -->
<alias from="(Default)" to="(dynamic view)" />
<alias from="edit" to="##edit" />
<alias from="sharing" to="##sharing" />
<alias from="view" to="(selected layout)" />
<!-- Actions -->
<action title="View" action_id="view" category="object"
condition_expr="" url_expr="string:${object_url}" visible="True">
<permission value="View" />
</action>
<action title="Edit" action_id="edit" category="object"
condition_expr="" url_expr="string:${object_url}/edit" visible="True">
<permission value="Modify portal content" />
</action>
</object>
Unrelated, but maybe I have to add something here...
I think I followed the correct procedure, as you may see, but I still cannot get it to work.
I know class Add is getting instanced because if I provide an updateWidgets() method and insert a breakpoint, it gets called; and when I introspect the object, self.template is None; even though:
(Pdb) getattr(self, 'grokcore.view.directive.template')
'add'
How can I provide a custom template to the Add Form of my custom type?

Answer 1

You should remove the line grok.context(ICrmContact).
From http://plone.org/products/dexterity/documentation/manual/developer-manual/advanced/forms:
Also note that we do not specify a context here. Add forms are always registered for any IFolderish context.