Hi Mat > Betreff: [Zope-dev] z3c.form SequenceWIdget extract > > Hi, > > 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 > "search.html?form.widgets.text=foo&form.buttons.search=1". > > 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: search.html?text=foo&text=bar that's the right way to send sequence data and will give you the result: text = ['foo', 'bar'] at the server side. Regards Roger Ineichen > 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: > continue > try: > self.terms.getTermByToken(token) > 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. > > Thanks, > > Mat > > -- > 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 _______________________________________________ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
