[Zope3-Users] Formlib and invariants?

[Bernd Dorn]

On 05.05.2006, at 03:15, Gary Poster wrote:

>
> On May 4, 2006, at 7:44 AM, Bernd Dorn wrote:
>
>>
>> On 04.05.2006, at 13:35, Gary Poster wrote:
>>
>>>
>>> On May 3, 2006, at 11:51 PM, Bernd Dorn wrote:
>>>
>>>> yes, this should really be fixed up in the default  
>>>> implementation of formlib
>>>>
>>>> because interface.Invalid has no registered multiadapter to
>>>>  zope.app.form.browser.interfaces.IWidgetInputErrorView
>>>>
>>>> you have to raise a WidgetInputError
>>>>
>>>> an example for such an error:
>>>>
>>>> from zope.schema import Datetime,Bool,ValidationError
>>>> from zope.app.form.interfaces import IWidgetInputError
>>>>
>>>> class FromGreaterThanTo(ValidationError):
>>>>     u"""From-Date is after To-Date"""
>>>>
>>>>     # this is needed to adapt to a view for formlib
>>>>     implements(IWidgetInputError)
>>>
>>> Well, you can raise any error from an invariant that  
>>> extends...zope.interface.Invalid, maybe?  The invariant interface  
>>> says what is allowed somewhere in zope.interface.
>>>
>>> ...I suppose we could have a generic view for Invalid errors that  
>>> simply said "This is invalid, try again"?  Doesn't seem very  
>>> useful to me.
>>>
>>> You are responsible for making sure you have a reasonable  
>>> exception view of an exception you raise.  I'm inclined to think  
>>> that this is a documentation bug at worst.
>>>
>>
>> yes, because in form.txt Invalid is used directly, wich implies  
>> that this should work
>
> Would you mind putting in a collector issue for this?
>

http://www.zope.org/Collectors/Zope3-dev/599

> Thanks
>
> Gary