Re: Example howto use FormEncode with Webware-1.1b1

Am 11.05.2010 08:53, schrieb Georg Balmer:
> I got the example from a direct download from formencode.org:
> .  [2] svn co http://svn.colorstudy.com/FormEncode/trunk FormEncode
>     (examples directory: WebwareExamples/index.py)

Thanks, I was not aware of that example. Seems it was actually written
for Paste WebKit (http://pythonpaste.org/webkit/).

As you noticed it uses htmlform which is deprecated; you must use
htmlfill directly. You must also add a name="color" attribute to the
checkboxes to make these work.

It seems your problem is that the formencode errors are now unicode, so
you must encode these. Here is how I got it working with the current
Webware (I simplified it a bit by not using Webware actions):


class form(Page):

    schema = FormSchema()

    def awake(self, trans):
        Page.awake(self, trans)
        try:
            fields = self.request().fields()
            if 'name' in fields:
                fields = self.schema.to_python(fields, self)
            else:
                fields = self.getDefaults()
        except formencode.Invalid, e:
            errors = dict((k, v.encode('utf-8'))
                for k, v in e.unpack_errors().iteritems())
        else:
            errors = None
        self.rendered_form = formencode.htmlfill.render(form_template,
            defaults=fields, errors=errors)

    def writeContent(self):
        self.write(page_style % self.rendered_form)

    def getDefaults(self):
        return dict(age='enter your age', color=['blue'])


Let me know how it works for you.

Btw, instead of using a schema, you could also embed the validation info
in the form template and use the SchemaBuilder to parse these.

-- Christoph

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