Re: [Zope3-Users] Re: Default value for an interface attribute
How about checking whether the value of 'default' is a
callable and if so call it to obtain the default value.
Yup... but evaluation of this is done internally by Zope schema
package in Field class I think. Seems for me that there is no way
to define 'default' as callable.
Right. This is an unsupported use case. I bet if someone writes up a
proposal and brings it up to discussion on zope3-dev@zope.org we'll find
a common solution to this.
Please also notice that we're moving to using launchpad more heavily. So
if you write a proposal in the wiki, please also submit it as a feature
request (blue print) in launchpad for the Zope 3 product.
I was playing a bit more with this issue and I realized that formlib
fields have 'get_rendered' method which is called to get default
values for a field. It is described at 'Computing default values'
section in formlib/form.txt.
Example from form.txt:
class MyAddForm(form.AddFormBase):
... actions = ()
...
... def now(self):
... return datetime.datetime(2002, 12, 2, 12, 30)
...
... form_fields = form.Fields(
... form.Fields(IOrder).omit('now'),
... form.Field(IOrder['now'], get_rendered=now),
... )
...
... def setUpWidgets(self, ignore_request=True):
... super(MyAddForm, self).setUpWidgets(ignore_request)
--
Maciej Wisniowski
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[Zope3-Users] Re: Default value for an interface attribute
Maciej Wisniowski schrieb: I have this interface: class INews(IPage): A news page for the application. date = Date( title=_(uPublication Date), description=_(uThe intended date for this news), default=date.today(), required=False ) With formlib (in Five in fact, not with Zope3) I was creating form_fields that should have dynamic defaults in __call__ method of formlib's AddForm (EditForm) view. I think it is not nice solution so I'd love to see better way of doing this. How about checking whether the value of 'default' is a callable and if so call it to obtain the default value. That way defautl=date.today (without the ())should do what Douglas expects (maybe this is even the case already?). Not that you want to know this but in Archetypes we explicitly support 'default' and 'default_method' as field properties. If no 'default' is provided, 'default_method' is looked up and if it exists it's called. Raphael ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Re: Default value for an interface attribute
--- Raphael Ritz [EMAIL PROTECTED] wrote:
How about checking whether the value of 'default' is a
callable and if so call it to obtain the default value.
That way
defautl=date.today
(without the ())should do what Douglas expects (maybe
this is even the case already?).
I tried this way, but raises this Exception:
ConfigurationError: ('Invalid value for', 'interface', (built-in method today
of type object at 0xb79465c0, type 'datetime.date'))
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Re: [Zope3-Users] Re: Default value for an interface attribute
How about checking whether the value of 'default' is a callable and if so call it to obtain the default value. Yup... but evaluation of this is done internally by Zope schema package in Field class I think. Seems for me that there is no way to define 'default' as callable. -- Maciej Wisniowski ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Re: Default value for an interface attribute
Hi, Am Donnerstag, den 01.03.2007, 16:54 +0100 schrieb Maciej Wisniowski: How about checking whether the value of 'default' is a callable and if so call it to obtain the default value. Yup... but evaluation of this is done internally by Zope schema package in Field class I think. Seems for me that there is no way to define 'default' as callable. Right. This is an unsupported use case. I bet if someone writes up a proposal and brings it up to discussion on zope3-dev@zope.org we'll find a common solution to this. Please also notice that we're moving to using launchpad more heavily. So if you write a proposal in the wiki, please also submit it as a feature request (blue print) in launchpad for the Zope 3 product. Christian -- gocept gmbh co. kg - forsterstraße 29 - 06112 halle/saale - germany www.gocept.com - [EMAIL PROTECTED] - phone +49 345 122 9889 7 - fax +49 345 122 9889 1 - zope and plone consulting and development signature.asc Description: Dies ist ein digital signierter Nachrichtenteil ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
