On 9/12/06, Adrian Holovaty <[EMAIL PROTECTED]> wrote:
>
> Hence, with this new API, the above view code would be written like this:
>
> form = ContactForm()
> if request.method == 'POST' and form.is_valid(**request.POST):
> send_email_and_redirect()
> return render_to_response('email_form.html', {'form':
> form.bind(**request.POST)})
Hmm... taking some ideas from Russ Magee, what about this:
form = ContactForm()
if request.method == POST and form.bind(request.POST):
send_email_and_redirect()
return render_to_response('email_form.html', {'form':form})
Assumptions: form.bind(data) does *not* return a BoundForm. bind does
the validation and probably populates form.errors or .errors() or
whatever. bind returns True or False depending on whether validation
succeeded or not. bind does not short circuit on the first error.
Validation happens only once, in the bind call. It's not entirely
obvious that a method called bind would return a boolean depending on
the success of validation, but examples and docs should clear that up
that I think. Maybe this is being too clever to save a couple of lines
or a few milliseconds though.
Just for good measure, here's what it would look like to use a change form:
address = Address.objects.get(address_id)
form = AddressChangeForm(address)
if request.method == POST and form.bind(request.POST):
# save the object and return a redirect
return render_to_response('email_form.html', {'form':form})
You pass the original object into the form constructor. The form
values are then initialized with values from the original object. When
you call bind, it overwrites the form values with the data passed to
bind.
Let me know if this doesn't make any sense. I may have forgotten to
write down some essential assumptions.
Joseph
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