Django3.0 add request.user to form request - python-3.x

Question

Let's say we have this model:
class Creation(models.Model):
title = models.CharField(max_length=DEFAULT_LENGTH)
url = models.CharField(max_length=DEFAULT_LENGTH)
date = models.DateTimeField('date published', default=datetime.date.today)
author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.PROTECT)
def __str__(self):
return self.title
And let's use this view:
def submit(request):
FormSet = modelformset_factory(Creation, fields=('title', 'url'))
if request.method == 'POST':
formset = FormSet(request.POST, request.FILES)
if formset.is_valid():
obj = formset.save(commit=False)
obj.author = request.user
obj.save()
else:
formset = FormSet
return render(request, 'app/submit.html', {'formset': formset})
I saved formset to obj and added request.user and committed it to the database.
This doesn't work, because now django throws an error which says
'list' object has no attribute 'author'
which makes perfectly sense, because there is no author in the fields-list above.
But if I add 'author' to fields, another selectbox would be displayed while rendering the template via {{formset}}.
Maybe I could code my own template-code instead of using {{formset}} and omit the author, but I feel that there must be a more elegant way with Django3.0. Is there any?
All I want to do is to get the foreignkey author (see model above) filled with the logged in user.

Answer 1

Turns out that something is wrong with modelformset_factory(..).
If you use a proper CreationForm in models.py:
class CreationForm(ModelForm):
class Meta:
model = Creation
fields = ['title', 'url']
and use it in your views.py:
formset = CreationForm(request.POST)
if request.method == 'POST':
if formset.is_valid():
f = formset.save(commit=False)
f.author = request.user
f.save()
it works.