utils.py 文件源码

def get_object(self):
        """ return the object based on pk or slug """
        queryset = self.filter_queryset(self.get_queryset())

        lookup_url_kwarg = self.lookup_url_kwarg or self.lookup_field
        lookup_value = self.kwargs[lookup_url_kwarg]

        filter_kwargs = {}
        if re.match(self.lookup_pk_regexp, lookup_value):
            filter_kwargs[self.lookup_field] = lookup_value
        else:
            filter_kwargs[self.lookup_slug_field] = lookup_value

        # May raise a permission denied
        obj = get_object_or_404(queryset, **filter_kwargs)
        self.check_object_permissions(self.request, obj)

        return obj