[Grok-dev] z3c.form

Tim Terlegård tim.terlegard at valentinewebsystems.se
Tue Jul 15 15:09:25 EDT 2008

On Jul 15, 2008, at 8:17 PM, Toni Mueller wrote:

> I find it non-obvious how to use z3c.form. There's a simple example of
> how to make an "AddForm" in the docs

Did you also see z3c.formdemo?

> , but (maybe because I don't
> understand Grokkers?) trying to copy that yields a traceback because I
> don't have a 'request' object.
> My playground app currently looks like this:
> class MyApp(grok.Application, grok.Container):
>    grok.traversable('add')
>    def traverse(self, name):
>        if name == 'add':
> 	    return MyAddForm()
> 	else:
> 	    raise NotImplementedError
> class MyAddForm(z3c.form.form.AddForm):
>    ...
> Running this yields this error:
> TypeError: __init__() takes exactly 3 arguments (1 given)

I haven't used z3c.form myself, but i would except AddForm to be a view,
that means the constructor wants a context and a request.

so MyAddForm(self.context, self.request) would perhaps work better.

I don't think it causes the error, but you don't need  
grok.traversable('attr') makes the 'attr' attribute on the class/object
traversable. But you don't have any 'add' attribute in your code. The
traverse() method works without that.


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