I need to update the object with its model form and passed the instance as
described in the django doc
<https://docs.djangoproject.com/en/1.8/topics/forms/modelforms/#the-save-method>.
However I am having two problems when saving the form:
1. When I change the title and submit the form, the image field gets
blank and it gives me an error that the image field is required. However
when the image is changed and not the title, it does not give any error.
2. If everything works and submits the form, it creates a new snap
object instead of updating the instance object.
In the views I tried using both the obj.save() and obj.update(), but
nothing helped. Please help me how to solve this problem. I will really
appreciate your help Thank you.
form:
class SnapForm(forms.ModelForm):
class Meta:
model = Snap
fields = ['title', 'description', 'image', 'upload_date']
view:
def admin_snap_settings(request, snap_id):
if not request.user.is_admin:
return render(request, 'admin_login_invalid.html')
else:
instance = Snap.objects.get(id=snap_id)
if request.user == instance.user:
if request.method == "POST":
form = SnapForm(request.POST, request.FILES,
instance=instance)
if form.is_valid():
form.save()
return
HttpResponseRedirect('/custom123user/admin/snapview')
else:
form = SnapForm(instance=instance)
return render(request, 'admin_snap_settings.html', {
'form': form
})
else:
return render(request, 'wrong_user.html')
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