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Martin, thanks a much for your support.
Sorry for my questions, I'm zope/plone newbie, just trying to move out
from Java. Someone advised to try Boring first, so I did. Now I'm trying
to play with ZopeSkel and the 'plone' template.
My src contains now namely:
./oit.jwfind:
docs oit oit.jwfind.egg-info README.txt setup.cfg setup.py
./oit.jwfind/oit:
__init__.py __init__.pyc jwfind
./oit.jwfind/oit/jwfind:
configure.zcml CrudExample.pyc __init__.pyc
CrudExample.py __init__.py tests.py
I registered the package in the buildout.cfg:
[buildout]
eggs =
oit.jwfind
develop =
src/oit.jwfind
[instance]
zcml =
oit.jwfind
CrudExample.py contains the whole tentative code, taken from
plone.z3cform docs:
from plone.z3cform.crud import crud
from plone.z3cform.tests import setup_defaults
from plone.z3cform.layout import wrap_form
setup_defaults()
from zope import interface, schema
class IPerson(interface.Interface) :
name = schema.TextLine()
age = schema.Int()
class Person(object):
interface.implements(IPerson)
def __init__(self, name=None, age=None):
self.name, self.age = name, age
def __repr__(self):
return "<Person with name=%r, age=%r>" % (self.name, self.age)
# names - keys in storage
storage = {'Peter': Person(u'Peter', 16),
'Martha': Person(u'Martha', 32)}
# form def
class MyForm(crud.CrudForm):
update_schema = IPerson
def get_items(self):
return sorted(storage.items(), key=lambda x: x[1].name)
def add(self, data):
person = Person(**data)
storage[str(person.name)] = person
return person
def remove(self, (id, item)):
del storage[id]
MyView = wrap_form(MyForm)
And I hope I registered the MyView this way in configure.zcml:
<configure
xmlns="http://namespaces.zope.org/zope";
xmlns:five="http://namespaces.zope.org/five";
xmlns:browser="http://namespaces.zope.org/browser";
i18n_domain="oit.jwfind">
<include package="oit.jwfind" />
<browser:page
for="oit.jwfind.CrudExample.IPerson"
class="oit.jwfind.CrudExample.MyView"
name="list_persons"
permission="cmf.ReviewPortalContent"
/>
</configure>
But now, I'm fumbling what to do next to see any results in Plone.
My final aim is to create a set of forms integrated into Plone site,
which would be able to manipulate objects persisted in RDBMS.
Wishing you a good week
David
Martin Aspeli napsal(a):
> Hi David,
>
>> I'm playing with a simple product called JWFind, derived from Boring
>> (http://www.zope.org/Members/gtk/Boring) now. The product sits in the
>> products directory, can be added and removed using ZMI, it seems OK.
>
> Note that Boring is 8.5 years old. I haven't looked at it, but I really
> doubt it follows current best practice. If you want a starting point, I
> suggest you install ZopeSkel and use the 'plone' template.
>
>> Because I'm willing to use it in Plone, the Zope version is 2.10.6-final.
>>
>> Now, I'm trying to handle the view of product using form made of
>> z3c.form. There is a problem. Currently, I'm getting
>>
>> Traceback (innermost last):
>> Module ZPublisher.Publish, line 119, in publish
>> Module ZPublisher.mapply, line 88, in mapply
>> Module ZPublisher.Publish, line 42, in call_object
>> Module Products.JWFind.JWFind, line 55, in index_html
>> Module z3c.form.form, line 189, in __call__
>> Module z3c.form.form, line 184, in update
>> Module z3c.form.form, line 134, in update
>> Module z3c.form.form, line 120, in updateWidgets
>> Module zope.component._api, line 103, in getMultiAdapter
>> Module zope.component._api, line 103, in getMultiAdapter
>> ComponentLookupError: ((<Products.JWFind.Person.Person object at
>> 0xb5003b2c>, <HTTPRequest, URL=http://localhost:8091/pokus/index_html>,
>> <JWFind at /pokus>), <InterfaceClass z3c.form.interfaces.IWidgets>, u'')
>
> It looks like oyu haven't wired up z3c.form properly. You need to use
> plone.z3cform if you're using z3c.form in Plone. Look at its README for
> details.
>
>> I guess, the error tells, that something implementing ``IWidgets``
>> cannot be found. But, I have no idea, how to deal with it. Maybe, should
>> I prepare the specific layer and skin to be able to use z3cforms and If
>> so, how to do it and especially how to register it properly? Or is there
>> a problem with the form definition itself? Or should I register
>> something to zope in addition to registration made in __init__?
>
> plone.z3cform takes care of this. The registration is in configure.zcml
> these days. We tend to keep our __init__.py's empty if we can (AT
> content types being the big example).
>
>> The relevant part of product source JWFind.py:
>>
>> def index_html(self, REQUEST=None):
>> """JWFind Form"""
>> out = Person(self, REQUEST)()
>> return out.PersonView
>
> This may work, but it's not really how you're meant to build forms.
> Please look at the plone.z3cform and z3c.form documentation on pypi.
>
>> The form is in separate file Person.py:
>>
>> from zope import interface, schema
>> from z3c.form import form, field, button
>> from plone.app.z3cform.layout import wrap_form
>>
>> class IPerson(interface.Interface):
>> age = schema.Int(
>> title=u"Age",
>> required=True)
>>
>> class Person(form.Form):
>> fields = field.Fields(IPerson)
>> ignoreContext = True # don't use context to get widget data
>> label = u"Please enter your age"
>>
>> @button.buttonAndHandler(u'Apply')
>> def handleApply(self, action):
>> data, errors = self.extractData()
>> print data['age'] # ... or do stuff
>>
>> PersonView = wrap_form(Person)
>
> Ah, I see that you *are* using plone.z3cform. In this case, just make
> sure your PersonView is registered with browser:page and that
> plone.z3cform's ZCML is loaded. You should then be able to access that.
> The index_html() thing is almost certainly wrong.
>
> Martin
>
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