user_profile_viewset.py 文件源码

def get_object(self):
        """Lookup user profile by pk or username"""
        lookup = self.kwargs.get(self.lookup_field, None)
        if lookup is None:
            raise ParseError(
                'Expected URL keyword argument `%s`.' % self.lookup_field
            )
        queryset = self.filter_queryset(self.get_queryset())

        try:
            pk = int(lookup)
        except (TypeError, ValueError):
            filter_kwargs = {'username': lookup}
        else:
            filter_kwargs = {'pk': pk}

        # Return a 404 if the user does not exist
        user = get_object_or_404(User, **filter_kwargs)
        # Since the user does exist, create a matching profile if necessary
        obj, created = queryset.get_or_create(user=user)

        # May raise a permission denied
        self.check_object_permissions(self.request, obj)

        return obj