D-oh! Look at this, a recent (?) dev version handles this for me:
self.subforms.append( SimpleItemForm(item, prefix='line_%s' %
n) )
This prefixes the IDs for each form field with line_N. (Oddly, it
then uses a hyphen to separate my prefix. I had expected an
underscore.) The names come out as line_1-FieldName.
It's then child's play to tell which datum belong to which
field. :) Happy, happy!
On 07-Jun-10, at 6:10 PM, David Priest wrote:
>
> request.POST returns a QueryDict object for those fields that have
> the same key. The key appears to be assigned by Django when it
> magics the form and template into an http response.
>
> It seems difficult to get Django to deal with multiple lines on a
> form, ie. as when creating almost any business form where there's a
> single header (names, addresses) and many lines (SKUs, descriptions,
> costs, quantities, etc).
>
> One of the easier ways of dealing with this is to simply use two
> forms, one for the header and one for the line item, and then to
> repeat the line item a number of times over. Unfortunately, Django
> doesn't provide an easy way to differentiate between these lines; the
> field ids will all be the same. Munging the field names doesn't
> work; that just makes it impossible to refer to them on the template
> (variable names aren't dynamic).
>
> So we seem to be stuck getting lists back. Question is, *is the
> order of the list guaranteed*? Which is to say that will the first
> items in SKU, Description, and Cost all refer to the same object; the
> second items to the second object; and so on?
>
> And if not, how does one deal with this situation?
>
> The Admin interface does it. I haven't been able to figure out where
> it does it, so I can steal its method...
>
> >
>
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