On Oct 20, 12:28 pm, Daniel Roseman <[EMAIL PROTECTED]>
wrote:
> On Oct 20, 11:12 am, simong <[EMAIL PROTECTED]> wrote:
>
>
>
> > if request.method == 'POST':
> > orderform = OrderForm(request.POST)
> > if orderform.is_valid():
> > preorder = orderform.save(commit=False)
> > orderno = '%04d' % (preorder.id)
> > preorder.orderno = orderno
> > preorder.cartid = cartid
> > preorder.save()
>
> > I do the uncommited save to get pk to pad it for an order number.
> > However, at orderform.save, I am now getting the eternally helpful
> > error
>
> > <type 'exceptions.TypeError'>: coercing to Unicode: need string or
> > buffer, NoneType found.
>
> I assume the error is happening at the line:
> orderno = '%04d' % (preorder.id)
> I'm not sure what you're expecting to happen here. You explicitly call
> commit=False on the form save, so the model isn't saved to the
> database and preorder won't have an id. Then you attempt to use that
> non-existent id - unsurprisingly, Python can't convert None into a
> four-digit number.
>
> If your 'orderno' field is simply a four-digit padded version of the
> pk field, you would probably be better of providing a model method to
> get that, rather than saving it twice to the database.
>
I agree that's not pretty, but it has been working for a while. I
added the TextArea widgets in for styling yesterday and now it's
stopped. I don't know if the two are related and I can't see why they
should be. I agree that it should be a model method though so I will
try that approach.
s/
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