def form_valid(self, form):
point = Point()
point.longitude = self.request.session["point"]["longitude"]
point.latitude = self.request.session["point"]["latitude"]
point.save()
form.instance.category = get_object_or_404(Category, name=self.kwargs.get("category"))
form.instance.point = point
self.object = form.save()
return HttpResponseRedirect(self.get_success_url())
def login(request):
'''
Create a new user or add the existing user to the session.
Logged in users are kept in the session.
This is called when a user has no session.
Users are also kept in the database and can be looked up by a user_id the user keeps in long term storage in the
case that the session ends.
Each login will also update the users' coordinates.
'''
user_id = request.POST['userId']
longitude = request.POST['lon']
latitude = request.POST['lat']
user = None
# create the point
point = Point()
point.latitude = latitude
point.longitude = longitude
point.save()
# get or create the user
if is_valid_uuid(user_id):
user_query = User.objects.filter(uuid=user_id)
if user_query.count() > 0:
user = user_query.get()
if not user:
user = User()
# set the new point
user.uuid = uuid4() # generate a new uuid every login
user.point = point
user.save()
request.session['user'] = {'pk': user.pk, 'uuid': str(user.uuid)}
# this one may not be necessary, but it may be better to keep this in the session as well
request.session['point'] = {'pk': point.pk, 'longitude': point.longitude, 'latitude': point.latitude}
return HttpResponse(user.uuid)