Django 1.7 matching query does not exist - django

Question

I have the following error when I try to create a class-based view to Modify my model Destino.
If possible I would do without using slug or pk in the urls.py
Error:
Destino matching query does not exist.
Request Method: GET
Request URL: http://localhost:8002/modificarVC/modificar.html
Django Version: 1.7
Exception Type: DoesNotExist
Exception Value:
Destino matching query does not exist.
Exception Location: /usr/local/lib/python2.7/dist-packages/Django-1.7- py2.7.egg/django/db/models/query.py in get, line 357
Python Executable: /usr/bin/python
Python Version: 2.7.6
Python Path:
['/home/juanma/Escritorio/exPWfebrero/Django/AgenciaViajes',
'/usr/local/lib/python2.7/dist-packages/Django-1.7-py2.7.egg',
'/usr/lib/python2.7',
'/usr/lib/python2.7/plat-x86_64-linux-gnu',
'/usr/lib/python2.7/lib-tk',
'/usr/lib/python2.7/lib-old',
'/usr/lib/python2.7/lib-dynload',
'/usr/local/lib/python2.7/dist-packages',
'/usr/lib/python2.7/dist-packages',
'/usr/lib/python2.7/dist-packages/PILcompat',
'/usr/lib/python2.7/dist-packages/gtk-2.0',
'/usr/lib/python2.7/dist-packages/ubuntu-sso-client',
'/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode']
URLS:
url(r'^modificarVC/modificar.html', modificarVC.as_view(), name='modificarDestino'),
VIEWS:
class modificarVC(UpdateView):
model = Destino
template_name = "modificarVC/modificar.html"
success_url = '/'
def get_object(self):
return Destino.objects.get(pk=self.request.GET.get('pk'))

Answer 1

As stated in some comments, you've done a few things that go against the power of class based views. In regards to the UpdateView which you're using, it's expecting a pk to be passed in.
# urls.py
url(r'^modificarVC/modificar/(?P<pk>\d+)/$', modificarVC.as_view(), name='modificarDestino')
When you hit a URL such as /modificarVC/modificar/5/ the UpdateView automatically sets the object by selected the object in your model Destino that has an id of 5.
# views.py
class modificarVC(UpdateView):
model = Destino
template_name = "modificarVC/modificar.html"
success_url = '/'

Answer 2

your error message hints at problem -- your request url didn't include a 'pk' request parameter (see 'Request URL')
Destino matching query does not exist.
Request Method: GET
Request URL: http://localhost:8002/modificarVC/modificar.html
run your request again, but add the pk parameter to the end as a query parameter: http://localhost:8002/modificarVC/modificar.html?pk=42