> Betreff: [Zope-dev] z3c.form SequenceWIdget extract
> I am using z3c.form, which is complicated but a lot more
> flexible than the old zope.formlib. Thanks for building it.
> Currently, I am having a problem with the SequenceWidget. Let
> me illustrate the scenario:
> I have a search-form with batching of the results - the links
> for the pages of the search contain the search parameters and
> the action-key as GET-parameters like this
> With "normal" Widgets, this works perfectly well. But when my
> search-form contains a SequenceWidget, this approach breaks,
> because SequenceWidget depends on zope-functionality in some
> other place, which transforms paramters with a key-postfix of
> ":list" to a list of values (the postfix is appended to the
> parameter-name by the template).
Can you give a smaple ot the search string which you are using
if it contains a sequence widget? I guess this string is wrong
and this ends in none sequence data at the server side.
If I'm right, now you are trying to convert this simple data
string into a sequence, right?
Try to build a sequence of values as:
that's the right way to send sequence data and will give you
text = ['foo', 'bar']
at the server side.
> The part of my application, that builds the query-string for
> the batch does however not have any knowledge about the
> widget-type of the parameters (that's intentionally to limit
> the dependencies to the form implementation).
> This problem would not exist, if the extract-method of
> SequenceWidget would contain two additional lines of code:
> def extract(self, default=interfaces.NOVALUE):
> """See z3c.form.interfaces.IWidget."""
> if (self.name not in self.request and
> self.name+'-empty-marker' in self.request):
> return 
> value = self.request.get(self.name, default)
> if value != default:
> > if not isinstance(value, (list, tuple)):
> > value = [value]
> for token in value:
> if token == self.noValueToken:
> except LookupError:
> return default
> return value
> I (hope I) can work around this problem by subclassing
> SequenceWidget and overwrite the extract method, but I
> wonder, if this fix introduces some unknown problems and
> whether it can be included in the standard implementation.
> Dipl. Inf. Matthias Lehmann
> Software- und Web-Development
> Käthe-Kollwitz-Straße 6
> 99734 Nordhausen
> fon: +49 3631 470652
> mobil: +49 170 5176774
> eMail: [EMAIL PROTECTED]
> web: http://www.matlehmann.de
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