Django file upload:Integrity Error - django

Question

This is what I got
IntegrityError at /malex/upload/
NOT NULL constraint failed: malex_document.uploaded_by_id
Request Method: POST
Request URL: http://127.0.0.1:8000/malex/upload/
Django Version: 2.0.5
Exception Type: IntegrityError
Models
class Profile(models.Model):
username = models.OneToOneField(User, on_delete=models.CASCADE)
password = models.TextField(max_length=80,blank=True)
class Document(models.Model):
docfile = models.FileField(upload_to='documents/%Y/%m/%d')
uploaded_by = models.ForeignKey(Profile,on_delete=models.CASCADE)
date_uploaded = models.DateTimeField(auto_now_add=True)
Forms
class LoginForm(forms.Form):
username = forms.CharField()
password = forms.CharField(widget=forms.PasswordInput)
class DocumentForm(forms.Form):
docfile = forms.FileField(label='Select a file')
views
def upload(request):
# Handle file upload
if request.method == 'POST':
form = DocumentForm(request.POST, request.FILES)
if form.is_valid():
newdoc = Document(docfile=request.FILES['docfile'])
newdoc.save()
**newdoc.uploaded_by = request.user.profile**
# Redirect to the document list after POST
return HttpResponseRedirect(reverse('upload'))
else:
form = DocumentForm() # A empty, unbound form
# Load documents for the list page
documents = Document.objects.all()
# Render list page with the documents and the form
return render(request,'upload.html',{'documents': documents, 'form': form})
If I add the line as neverwalker alone has suggested
'AnonymousUser' object has no attribute 'profile'
What even makes things more strange with this integrity error is that the file is uploaded
~/nup/malex/media/documents/2018/06/22$ ls -lh 262_V01_C06_R000_TEy_BH_131072H.ats
-rw------- 1 milenko milenko 46M јун 22 07:22 262_V01_C06_R000_TEy_BH_131072H.ats
Why do I got this error and how to fix this?

Answer 1

You didn't set uploaded_by attribute. Since it's not nullable this is raise error. To fix this, you need to provide uploaded_by to new Document instance before saving like this:
#login_required
def upload(request):
# Handle file upload
if request.method == 'POST':
form = DocumentForm(request.POST, request.FILES)
if form.is_valid():
newdoc = Document(docfile=request.FILES['docfile'])
newdoc.uploaded_by = request.user.profile # if Profile has onetofield with User model
# newdoc.uploaded_by = request.user if Profile is your user_model
newdoc.save()
Note uose login_required decorator to ensure current user is authenticated.
Also you can set uploaded_by as nullable field:
uploaded_by = models.ForeignKey(Profile, on_delete=models.CASCADE, null=True)
In this case uploaded_by will not required, and will be set as ULL for new records.