matching django url with views using a model slug - django

Question

my problem is that I can not establish a reverse match, most likely doing something wrong with my url definition (?). Ultimately what I am trying to do is the following:
User selects 2 location points which the 'new_pointview' view, saves into a DB. I also define a unique slug which contains location information and save it to the DB via the save() within the model. Then the user should be redirected to a url (pointview view) which uses the slug I created in the previous step i.e /pointview/slug. Here is the code:
models.py
class Points(models.Model):
starting_point_longitude = models.FloatField(null=True)
starting_point_latitude = models.FloatField(null=True)
ending_point_longitude = models.FloatField(null=True)
ending_point_latitude = models.FloatField(null=True)
url = models.SlugField(max_length=250, null=True, unique=True, blank=False)
def save(self, *args, **kwargs):
self.url = 'start_lon-{0}-start_lat-{1}-end_lon-{2}-end_lat-' \
'{3}'.format(self.starting_point_longitude,
self.starting_point_latitude,
self.ending_point_longitude,
self.ending_point_latitude)
super(Points, self).save(*args, **kwargs)
def get_absolute_url(self):
return reverse('pointview', kwargs={'url': self.url})
views.py
def pointview(request, url):
point = get_object_or_404(Points, url=url)
content = {'starting_point_longitude':
point.starting_point_longitude,
'starting_point_latitude':
point.starting_point_latitude,
'ending_point_longitude':
point.ending_point_longitude,
'ending_point_latitude':
point.ending_point_latitude}
return render(request, 'points.html', {'user_bundle': content})
def new_pointview(request):
Points.objects.create(
starting_point_longitude=request.POST['starting_point_longitude'],
starting_point_latitude=request.POST['starting_point_latitude'],
ending_point_longitude=request.POST['ending_point_longitude'],
ending_point_latitude=request.POST['ending_point_latitude'],
)
points_filtered = Points.objects.filter(
starting_point_longitude=request.POST[
'starting_point_longitude']).filter(
starting_point_latitude=request.POST[
'starting_point_latitude'])
unique_url = points_filtered.values()[0]['url']
return redirect('/pointview/{0}/'.format(unique_url))
urls.py
urlpatterns = [
path(r'^pointview/(?P<url>[-\w]+)/$', views.pointview, name='pointview'),
path('^new_pointview/', views.new_pointview, name='new_pointview'),
]
The error:
The current path, pointview/start_lon-738949.9146592747-start_lat--153698.8751025315-end_lon-759997.8063993475-end_lat--168467.65638300427/, didn't match any of URL patterns. Hope you can give me some feedback here..

Answer 1

For future reference, it was a regex problem, using the following non intuitive regex solved it:
url('^pointview/(?P<url>start_lon[--W]+start_lat[--W]+end_lon[--W]+end_lat[--W]+)/', views.pointview, name='pointview')
I would be very interesting though if someone can give a more elegant solution.