Am Freitag, 10. August 2007 04:14 schrieb Andrew Groom:
> Hi All,
>
> I've been battling with formlib for the last three days now and, while
> I've learnt a lot, it's nearly driven me crazy. I'm trying to use it to
> create simple search form, i.e., a form that does input validation,
> remembers the values you entered, etc., but is not tied to a persisted
> object.
>
> I've got the form rendering and processing requests, but I'm completely
> stuck on getting the form to remember the values I just entered after a
> form post.
>
> Has anyone got any suggestions ? Here's what I've got so far, the latest
> attempt being to use a dummy object to provide the context, which also
> doesn't seem to work:
Yes, I do the same and use a self-made class, called "ActionForm" for that,
it's quite simple:
class ActionForm(Formframe, form.Form):
""" Generic form for context-less patterns """
def updateWidgets(self):
self.widgets = getMultiAdapter(
(self, self.request, self.getContent()), IWidgets)
self.widgets.ignoreContext = True
self.widgets.update()
Then I have a persisten object, that acts as an entry point to my view, and
which may provide various methods, e.g.:
class SearchData(persistent.Persistent):
implements(ISearchData)
def search_data(self, **kd):
# Here the data is retrieved, in my case from a relational database
return data
And then there's the view:
class ViewSerachKunde(ActionForm):
formErrorsMessage = _('There were some errors.')
template = ViewPageTemplateFile('pt/searchdata.pt')
fields = field.Fields(IViewSearchData)
# If data is found, it's stored in a view-object-attribute
found_data = None
@button.buttonAndHandler('Search', name='search')
data, errors = self.extractData()
if errors:
self.status = self.formErrorsMessage
return
self.found_data = self.context.search_data(**data)
And then in my template file I have something like this (please note that I
use a custom library for displaying fields (formsnippet):
<--! This displayes the search-widgets -->
<span tal:repeat="widget view/widgets/values">
<span tal:replace="structure widget/snippets/div" />
</span>
<--! And this displays the found data -->
<div tal:condition="view/found_data">
<h2>Found Data:</h2>
<span tal:replace="structure view/found_data"/>
</div>
Best Regards,
Hermann
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