how to upload multiple images properly - django

Question

I have a simple model which has four different fileFields for uploading different files and images.
this is my models:
class DocumentInfo(models.Model):
id = models.AutoField(primary_key=True)
certificate = models.FileField(upload_to="documents", null=True)
id_card = models.FileField(upload_to="documents", null=True)
service_certificate = models.FileField(upload_to="documents", null=True)
educational_certificate = models.FileField(upload_to="documents", null=True)
users need to simply upload some images in four individual fields so, I created a simple form and passed it to views like this:
class DocumentForm(forms.ModelForm):
class Meta:
model = DocumentInfo
fields = ['certificate','id_card','service_certificate','educational_certificate']
views.py:
def document_info(request):
if request.method == 'POST':
form = DocumentForm(request.POST, request.FILES)
if form.is_valid():
form.instance.user = request.user
form.save()
return redirect('document')
if 'delete' in request.GET:
return delete_item(DocumentInfo, request.GET['id'])
else:
form = DocumentForm()
documents = DocumentInfo.objects.filter(user=request.user)
context = {
'form': form,
'documents': documents,
}
return render(request, 'reg/documents.html', context)
it works just fine at first but I cant reupload anything! the uploaded image neither gets saved the second time around nor deleted. what am I doing wrong?

Answer 1

try this.
views.py
def document_info(request):
documents = DocumentInfo.objects.filter(user=request.user).order_by('-pk')
if request.method == 'POST':
if documents:
form = DocumentForm(request.POST, request.FILES,instance=documents[0])
else:
form = DocumentForm(request.POST, request.FILES)
if form.is_valid():
if not documents:
form.instance.user = request.user
form.save()
return redirect('document')
else:
if documents:#if the user already has a document.
form = DocumentForm(instance=documents[0])
else:
form = DocumentForm()
context = {
'form': form,
'documents': documents,
}
return render(request, 'reg/documents.html', context)