[Zope3-Users] zope.schema.Object and custom widgets in formlib

[Jachin Rupe]

On May 22, 2006, at 2:19 AM, Frank Burkhardt wrote:

[snip]

>
> Yes, I'm using Zope-SVN but the ObjectWidget-Code was written for  
> ZopeX3.
> I can't see the Dispatcher-Widget. Are you sure, you implemented  
> and registered it
> as described in Part "Vorarbeit(Preparation)" of the Howto?

Ah... I was thinking that part was some sort of generic example.   
Alright, I added that code and now my component  
"ComponentLookupError" cleared up.  However I'm now having another  
problem.  When I add a new

I am getting a "ForbiddenAttribute" error.  I can run the addform  
with out any errors but if I editform the "street" field is blank  
(even though I added some text to it when I added it).  Then if I  
makes some changes to the fields and try to save my changes I get one  
of these:

ForbiddenAttribute: ('street', <simple_abook.entry.ABookEntry object  
at 0x405d3b0>)

Anytime I've seen this in the past it means there's a permission  
problem.  So I played with the security setting in configure.zcml  
some but I could not find anything that helped.

Judging from the error message it looks like it's trying to look up  
the security settings for "street" in entry.ABookEntry.  Which would  
kinda makes sense, and then it should be looking instead in  
entry.StreetAddress, but I don't know how to make it do that.  I'll  
include my code again too.

thanks

-jachin


<!-- -===configure.zcml===- -->

<configure
	xmlns="http://namespaces.zope.org/zope"
	xmlns:browser="http://namespaces.zope.org/browser">
	
	<content class=".entry.ABookEntry">
		<factory
			id = "entry.ABookEntry"
			title = "An address book entry"
			/>
		<require
			permission="zope.View"
			interface=".interfaces.IABookEntry"
			/>
		<require
			permission="zope.ManageContent"
			set_schema=".interfaces.IABookEntry"
			/>
	</content>
	
	<content class=".entry.StreetAddress">
		<allow interface=".interfaces.IABookEntry" />
	</content>
	
	<view type="zope.publisher.interfaces.browser.IBrowserRequest"
		for="zope.schema.interfaces.IObject"
		provides="zope.app.form.interfaces.IInputWidget"
		factory=".objectwidgetdispatcher.ObjectInputWidget"
		permission="zope.Public"
	/>
	
	<view
		type="zope.publisher.interfaces.browser.IBrowserRequest"
		for="zope.schema.interfaces.IObject .interfaces.IStreetAddress"
		provides="zope.app.form.interfaces.IInputWidget"
		factory=".widgets.ABookEntryWidget"
		permission="zope.Public"
	/>
	
	<browser:addform
		label = "New address book entry"
		name = "add_address_book_entry.html"
		schema = ".interfaces.IABookEntry"
		content_factory = ".entry.ABookEntry"
		permission = "zope.ManageContent"
		/>
	
	<browser:editform
		label = "Change address book entry"
		name = "edit.html"
		schema = ".interfaces.IABookEntry"
		permission = "zope.ManageContent"
		menu="zmi_views"
		title="Edit"
		/>
	
	<browser:addMenuItem
		title="ABook Entry"
		class=".entry.ABookEntry"
		permission="zope.ManageContent"
		view = "add_address_book_entry.html"
		/>
	
</configure>



# -===interfaces.py===-

from zope.interface import Interface
from zope.schema import TextLine, Object

class IStreetAddress(Interface):
	"""A street address"""
	
	street = TextLine(
		title=u"street",
		description=u"",
		required=False)


class IABookEntry(Interface):
	"""An address book entry"""
	streetAddress = Object(
		schema=IStreetAddress,
		title=u"Street Address",
		description=u"",
		required=False)
	
	firstName = TextLine(
		title=u"First Name",
		description=u"",
		required=False)
	
# -===entry.py===-

from zope.interface import implements
from persistent import Persistent
from interfaces import IStreetAddress
from interfaces import IABookEntry


class StreetAddress(Persistent):
	"""The Street Address object."""
	implements(IStreetAddress)


class ABookEntry(Persistent):
	"""The Address Book Entry object."""
	implements(IABookEntry)

# -===widgets.py===-

from zope.app.form.browser import ObjectWidget
from entry import ABookEntry

def ABookEntryWidget(context,obj,request):
	return ObjectWidget(context, request, ABookEntry)

# -===objectwidgetdispatcher.py===-

from zope.app import zapi
from zope.interface import implements

from zope.app.form.interfaces import IInputWidget

def ObjectInputWidget(context, request):
	"""Dispatch widget for Object schema field to a widget that is
	registered for (IObject, schema, IBrowserRequest) where schema
	is the schema of the object."""
	
	class Obj(object):
		implements(context.schema)
	
	widget=zapi.getMultiAdapter((context, Obj(), request), IInputWidget)
	return widget