def register(request):
args = {}
args['forms'] = SignUpForm()
args['form1'] = ImagefieldForm()
if request.POST:
    newuser_form = SignUpForm(request.POST)
    image_field_form = ImagefieldForm(request.POST, request.FILES)
    if newuser_form.is_valid() and image_field_form.is_valid():
        user = newuser_form.save(commit=False)
        user.is_active = False
        user.save()
        print ('User saved')
        image_field_form.save(commit=False)
        image_field_form.user_id = 'user'
        image_field_form.save()
        current_site = get_current_site(request)
        mail_subject = 'Welcome to site'
        message = render_to_string('login_app/please_active_email.html', {
            'user': user,
            'domain': current_site.domain,
            'uid': urlsafe_base64_encode(force_bytes(user.pk)).decode(),
            'token': account_activation_token.make_token(user),
        })
        to_email = newuser_form.cleaned_data.get('username')
        email = EmailMessage(
            mail_subject, message, to=[to_email])
        email.send()
        return HttpResponse('Please check your email')

    else:
        args['forms'] = newuser_form
return render(request, 'login_app/registration.html', args)

class Profile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
avatar = models.ImageField(upload_to='images/users', blank=False)

class ImagefieldForm(forms.ModelForm):
avatar = forms.ImageField(required=True)

class Meta:
    model = Profile
    fields = ('avatar', )

File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/utils/six.py", line 683, in reraise
raise value.with_traceback(tb)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/django/base.py", line 176, in _execute_wrapper
return method(query, args)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/cursor.py", line 561, in execute
self._handle_result(self._connection.cmd_query(stmt))
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/connection.py", line 525, in cmd_query
result = self._handle_result(self._send_cmd(ServerCmd.QUERY, query))
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/connection.py", line 427, in _handle_result
raise errors.get_exception(packet)
django.db.utils.IntegrityError: Column 'user_id' cannot be null