Matt Wilson schrieb:
> So, that validate decorator works fine except when an incoming value
> is None. Despite what the form encode docs say, None is not converted
> into an empty list.
>
> But I'm probably doing something wrong. I usually am. Here's my
> code:
>
> @validate(validators={'a':validators.ForEach(validators.Int(),
> convert_to_list=True),
> 'b':validators.ForEach(validators.Int(),
> convert_to_list=True)})
> @expose()
> def f(self, a, b):
> log.debug("a is %s." % a)
> log.debug("b is %s." % b)
> return dict(a=a, b=b)
>
> When I hit my app with this GET: http://sprout/f?a=1&a=2&b=
>
> This is what I see in my logs:
>
> 2008-02-21 15:25:03,649 controllers DEBUG a is [1, 2].
> 2008-02-21 15:25:03,650 controllers DEBUG b is None.
>
> And this is what I get in my browser:
>
> {"a": [1, 2], "b": null, "tg_flash": null}
>
> What silly mistake am I making this time?
How about
def f(self, a=[], b=[])
Just a guess though. To be brutally honest I'm not sure if there even is
a validator invoked in case of no value being present at all. IF so,
you could of course create your own ForEach-validator that just does
this, overloading the _to_python-method (or whichever is needed, but I
guess that's the one) to return an empty list if the
super-implementation doesn't.
Diez
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