CODEWITHSUNDEEP
pythondjangourl-routing
Luke
Luke

Reputation: 2486

Accessing Primary Key from URL in Django View Class

I have a URL pattern mapped to a custom view class in my Django App, like so:

url( r'^run/(?P<pk>\d+)/$', views.PerfRunView.as_view( ))

The problem is, I cannot figure out how I can access 'pk' from the URL pattern string in my view class so that I can retrieve a specific model object based on its database id. I have googled, looked through the Django documentation, searched Stack Overflow, and I can't find a satisfactory answer at all.

Can anybody tell me?

Upvotes: 34

Views: 54073

Answers (4)

Prashant Goyal
Prashant Goyal

Reputation: 11

As many have said self.kwargs works fine. It particularly helps in self.get_queryset() function, unlike list, create where pk works better.

Upvotes: 0

Milad shiri
Milad shiri

Reputation: 990

This is an example based on django restframework to retrieve an object using pk in url:

views.py

class ContactListView(generics.ListAPIView):
    queryset = Profile.objects.all()
    serializer_class = UserContactListSerializer

    def get(self, request, pk, *args, **kwargs):
        contacts = Profile.objects.get(pk=pk)
        serializer = UserContactListSerializer(contacts)
        return Response(serializer.data)

urls.py

    url(r'^contact_list/(?P<pk>\d+)/$', ContactListView.as_view())

Upvotes: 1

raghu
raghu

Reputation: 394

to access the primary key in views post = 

Class_name.objects.get(pk=self.kwargs.get('pk'))

Upvotes: 15

Daniel Roseman
Daniel Roseman

Reputation: 599628

In a class-based view, all of the elements from the URL are placed into self.args (if they're non-named groups) or self.kwargs (for named groups). So, for your view, you can use self.kwargs['pk'].

Upvotes: 77

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