Re: [Zope3-Users] want to use ObjectWidget and default add form
[the subject has really become: how can a custom widget access content
objects and containers?]
Hi,
I'm trying to model a 1-to-1 relationship in zope3: a Driver class that
contains an instance of a Car class. I model the car as a schema.Object
inside the driver interface:
class IDriver(Interface):
car = Object(
title = u'car',
default = None,
schema=ICar,
required = False)
and it seems that I need to define a custom widget in order to avoid a
ComponentLookupError. I'd like to let the user select from all the cars
in the application's container, and I can provide that list in the form
class:
from zope.formlib import form
class DriverEdit(form.EditForm):
def cars(self):
parent=zapi.getParent(self.context)
return [name for name,child in parent.items() if
ICar.providedBy(child)]
form_fields = form.Fields(IDriver)
form_fields["car"].custom_widget = CarsListWidget
but I don't know how to access the form instance from the widget class:
from zope.app.form.browser.widget import SimpleInputWidget
class CarsListWidget(SimpleInputWidget):
def __call__(self):
return '\n'.join([
'' % ('car'),
'\n'.join(['\t%s' % (car)
### self.context is Object field, not DriverEdit form
###so "self.context.cars()" FAILS
for car in self.context.cars()]),
'',
])
I dont really need to access the form instance, but that seems to be a
reasonable way to access the application's container (all drivers and
cars are put into the same 'LimoService' container for now).
So how can I access the list of cars from the widget? And does the
answer differ in add forms vs edit forms?
Thanks!
john saponara wrote:
thanks christophe. while looking for an example of how to use
CustomWidgetFactory, i found a comment on the web about formlib
replacing browser:editform/addform (at
http://faassen.n--tree.net/blog/view/weblog/2005/09/06/0) and so i'm now
using the instructions in zope/formlib/form.txt. unfortunately i still
had to customize the car widget to avoid an error. for the car widget,
i want to let the user select from the list of all car objects in the
parent 'limoService' container, but when i do i get the error "Not
enough context information to get parent" at the getParent call. my
custom widget is:
from zope.app.form.browser.widget import SimpleInputWidget
class CarsListWidget(SimpleInputWidget):
def cars(self):
parent=zapi.getParent(self.context)
return [name for name,child in parent.items() if
ICar.providedBy(child)]
def __call__(self):
return '\n'.join([
'' % ('car'),
'\n'.join(['\t%s' % (car) for car in
self.cars()]),
'',
])
and the full error (when trying to edit driver 'd1' via 'd1/edit.html') is:
2008-01-03T21:56:05 ERROR SiteError
http://localhost:2020/mylimo/d1/edit.html
Traceback (most recent call last):
File "C:\Python24\Lib\site-packages\zope\publisher\publish.py", line
133, in publish
result = publication.callObject(request, obj)
File
"C:\Python24\Lib\site-packages\zope\app\publication\zopepublication.py",
line 161, in callObject
return mapply(ob, request.getPositionalArguments(), request)
File "C:\Python24\Lib\site-packages\zope\publisher\publish.py", line
108, in mapply
return debug_call(obj, args)
- __traceback_info__: zope.app.pagetemplate.simpleviewclass.SimpleViewClass from
C:\pr\z3\lib\python\limoService\edit.pt instance at 0x0210EE50>
File "C:\Python24\Lib\site-packages\zope\publisher\publish.py", line
114, in debug_call
return obj(*args)
File "C:\Python24\Lib\site-packages\zope\formlib\form.py", line 770,
in __call__
return self.render()
File "C:\Python24\Lib\site-packages\zope\formlib\form.py", line 764,
in render
self.form_result = self.template()
File
"C:\Python24\Lib\site-packages\zope\app\pagetemplate\viewpagetemplatefile.py",
line 83, in __call__
return self.im_func(im_self, *args, **kw)
File
"C:\Python24\Lib\site-packages\zope\app\pagetemplate\viewpagetemplatefile.py",
line 51, in __call__
sourceAnnotations=getattr(debug_flags, 'sourceAnnotations', 0),
File
"C:\Python24\Lib\site-packages\zope\pagetemplate\pagetemplate.py", line
117, in pt_render
strictinsert=0, sourceAnnotations=sourceAnnotations)()
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
271, in __call__
self.interpret(self.program)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
861, in do_defineMacro
self.interpret(macro)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
909, in do_extendMacro
definingName, exte
Re: [Zope3-Users] want to use ObjectWidget and default add form
thanks christophe. while looking for an example of how to use
CustomWidgetFactory, i found a comment on the web about formlib
replacing browser:editform/addform (at
http://faassen.n--tree.net/blog/view/weblog/2005/09/06/0) and so i'm now
using the instructions in zope/formlib/form.txt. unfortunately i still
had to customize the car widget to avoid an error. for the car widget,
i want to let the user select from the list of all car objects in the
parent 'limoService' container, but when i do i get the error "Not
enough context information to get parent" at the getParent call. my
custom widget is:
from zope.app.form.browser.widget import SimpleInputWidget
class CarsListWidget(SimpleInputWidget):
def cars(self):
parent=zapi.getParent(self.context)
return [name for name,child in parent.items() if
ICar.providedBy(child)]
def __call__(self):
return '\n'.join([
'' % ('car'),
'\n'.join(['\t%s' % (car) for car in
self.cars()]),
'',
])
and the full error (when trying to edit driver 'd1' via 'd1/edit.html') is:
2008-01-03T21:56:05 ERROR SiteError
http://localhost:2020/mylimo/d1/edit.html
Traceback (most recent call last):
File "C:\Python24\Lib\site-packages\zope\publisher\publish.py", line
133, in publish
result = publication.callObject(request, obj)
File
"C:\Python24\Lib\site-packages\zope\app\publication\zopepublication.py",
line 161, in callObject
return mapply(ob, request.getPositionalArguments(), request)
File "C:\Python24\Lib\site-packages\zope\publisher\publish.py", line
108, in mapply
return debug_call(obj, args)
- __traceback_info__: zope.app.pagetemplate.simpleviewclass.SimpleViewClass from
C:\pr\z3\lib\python\limoService\edit.pt instance at 0x0210EE50>
File "C:\Python24\Lib\site-packages\zope\publisher\publish.py", line
114, in debug_call
return obj(*args)
File "C:\Python24\Lib\site-packages\zope\formlib\form.py", line 770,
in __call__
return self.render()
File "C:\Python24\Lib\site-packages\zope\formlib\form.py", line 764,
in render
self.form_result = self.template()
File
"C:\Python24\Lib\site-packages\zope\app\pagetemplate\viewpagetemplatefile.py",
line 83, in __call__
return self.im_func(im_self, *args, **kw)
File
"C:\Python24\Lib\site-packages\zope\app\pagetemplate\viewpagetemplatefile.py",
line 51, in __call__
sourceAnnotations=getattr(debug_flags, 'sourceAnnotations', 0),
File
"C:\Python24\Lib\site-packages\zope\pagetemplate\pagetemplate.py", line
117, in pt_render
strictinsert=0, sourceAnnotations=sourceAnnotations)()
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
271, in __call__
self.interpret(self.program)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
861, in do_defineMacro
self.interpret(macro)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
909, in do_extendMacro
definingName, extending)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
891, in do_useMacro
self.interpret(macro)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
536, in do_optTag_tal
self.do_optTag(stuff)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
521, in do_optTag
return self.no_tag(start, program)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
516, in no_tag
self.interpret(program)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
861, in do_defineMacro
self.interpret(macro)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
957, in do_defineSlot
self.interpret(block)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
949, in do_defineSlot
self.interpret(slot)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
861, in do_defineMacro
self.interpret(macro)
File "C:\Python24\Lib\site-packages\zope\tal\talinterpreter.py", line
346, in interpret
handlers[opcode](self, args)
File "C:\Pyth
Re: [Zope3-Users] want to use ObjectWidget and default add form
john saponara a écrit : hi, please point me to an example showing how to use ObjectWidget with a default add form. in case there is no example, perhaps my failing attempt below could serve as one, once it's modified to work. [...] ComponentLookupError: ((0x03584090>, URL=http://localhost:2020/mylimo/@@+/action.html>), zope.app.form.interfaces.IInputWidget>, u'') 127.0.0.1 - - It seems you have no widget associated to your Object field. You should use less zcml and implement your own addform: driver_widget = CustomWidgetFactory(ObjectWidget, Driver) class DriverAddForm(AddForm): form_fields = Fields(IDriver) form_fields['car'].custom_widget = driver_widget def __init__(self, context, request): (...) def create(self.data): (...) Christophe ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
