'Solve it,
Add the following line before "register_form =...."
v = [form.Validator("Check more than 3", lambda x: len(x.check)>3)]
Then modify line "register_form= ....."
register_form = form.Form(validators=v, *args)
to add the validator.
Then modify line: "if not f.validates():"
if not f.validates(web.input(check=[])):
to pass the submited data and validate it.
Hope this helps. I was searching the net for a "quick" solution but could
not find one.
On Tuesday, June 4, 2013 7:16:58 PM UTC+3, daniel crisan wrote:
>
> Hello,
>
> I need to validate a form only if X or more checkboxes were checked and I
> cannot find out how. Bellow is the simple code which needs the validator
> (there are 5 checkboxes - same name - and the form should validate only if
> 3 or more were selected). Can you please point me to the right direction?
>
> import web
> from web import form
>
> render = web.template.render('templates/')
>
> urls = ('/', 'index')
> app = web.application(urls, globals())
>
> args = ()
> for i in range(0, 5):
> args = args + ( form.Checkbox('check', value=str(i) ), )
>
> args = args + (form.Button("submit", type="submit", description="Submit"),)
>
> register_form = form.Form(*args)
>
> class index:
> def GET(self):
> # do $:f.render() in the template
> f = register_form()
> return render.register(f)
>
> def POST(self):
> f = register_form()
> if not f.validates():
> return render.register(f)
> else:
> pdata=web.input(check=[])
> print pdata
>
> if __name__=="__main__":
> web.internalerror = web.debugerror
> app.run()
>
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