Ah, OK. The docs don't make that very clear, especially since the normal
pattern is that form fields function as display and edit (i.e., you can
send initial data to the form). I guess I expected the widget to handle
both the upload function and display the link without additional
configuration on my part. Django has spoiled me I guess :-). Thanks for
the explanation
Shawn
On Thursday, June 5, 2014 3:41:11 PM UTC-5, Tom Evans wrote:
>
> On Thu, Jun 5, 2014 at 8:12 PM, Shawn H <shawn....@gmail.com <javascript:>>
> wrote:
> > I've been trying to understand how to handle file uploads, and I've got
> the
> > upload portion down. I have a FileField in my form, process it in my
> view,
> > and it's saved in the correct location as specified in MEDIA_ROOT and
> the
> > upload_to attribute of the Model. My problem is, when I try to bind the
> > uploaded document in a GET request, nothing is working. I tried
> following
> > the documentation in the docs, but when I do that I get a 'FieldFile'
> does
> > not have the buffer interface error. How do I bind the file to the form
> so
> > it's available to the user to download or open, while preserving the
> ability
> > for the user to replace the uploaded file? Do I have to extract the
> file
> > from the model field before binding it to the form? Code below. Thanks
> in
> > advance
> >
> > form_data = {
> > 'sub_id':s.id,
> > ...
> > 'sub_verified_by':s.verified_by
> > }
> > form_file = {'sub_pdr': SimpleUploadedFile('SubmissionPDR.docx',
> > s.pdr_file)}
> > form = SubmissionEditForm(form_data, form_file)
>
> I think you are trying to redisplay a form that has already been
> submitted, with the file there? This is not going to work, mainly
> because a file field in a form never has an initial value, but also
> because it is the wrong approach.
>
> To display all the fields apart from the file field, you should be
> passing the form data to the form as initial, not as data - eg
> SubmissionEditForm(initial=form_data) - so that you do not create a
> bound form - a form that has been submitted already.
>
> To make the file available to download, you simply add the url to the
> file to your template context - s.pdr_file.url - and make a link to it
> - no forms involved. Or just add 's', and access it in the template:
>
> {% if s.pdr_file %}
> <a href="{{ s.pdr_file.url }}">Download file</a>
> {% endif %}
>
> Cheers
>
> Tom
>
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