I am using the django rest framework in Jango, and I wanted to apply the Python package called django-freindship. And then I found a package like https://pypi.python.org/pypi/fh-drf-friendship/0.1.1 on Google, so I wanted to use it. But I'm a beginner in Python and programming, so I didn't know how to apply it even if I had this, so I tried to copy and paste the code of fh-drf-friendship myself,
In the original fh-drf-friendship code, serializers.py
User = get_user_model()
UserListSerializer = module_loading.import_string(settings.DRF_FRIENDSHIP['USER_LIST_SERIALIZER'])
There was a code like this.
I've already written something called Userseializer while writing the django rest framework, so I erased that code and copied and pasted it. And that cord didn't even seem to work when I just copied and pasted it.
views.py
class FriendViewSet(NestedViewSetMixin, mixins.ListModelMixin, mixins.CreateModelMixin,
mixins.DestroyModelMixin, viewsets.GenericViewSet):
serializer_class = UserSerializer
def create(self, request, *args, **kwargs):
request.data['to_user'] = self.get_parents_query_dict()['user']
serializer = FriendSerializer(data=request.data)
if serializer.is_valid():
instance = serializer.save()
headers = self.get_success_headers(serializer.data)
serializer = FriendReadSerializer(instance)
return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def get_object(self):
to_user = User.objects.get(pk=self.get_parents_query_dict().get('user'))
from_user = User.objects.get(pk=self.kwargs.get('pk'))
return Friend.objects.get(to_user=to_user, from_user=from_user)
serializers.py
class UserSerializer(serializers.ModelSerializer):
related_postwriter = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
related_commentwriter = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
class Meta:
model = User
fields = ('id', 'username', 'email', 'related_postwriter', 'related_commentwriter')
class FriendSerializer(rest_framework_common.serializers.ModelSerializer):
user = serializers.PrimaryKeyRelatedField(source='from_user', queryset=User.objects.all())
class Meta:
model = Friend
exclude = ('url', 'from_user',)
def create(self, validated_data):
fr = FriendshipRequest.objects.get(from_user=validated_data['from_user'], to_user=validated_data['to_user'])
if fr and fr.accept():
return Friend.objects.get(from_user=validated_data['from_user'], to_user=validated_data['to_user'])
class FriendReadSerializer(rest_framework_common.serializers.ModelSerializer):
user = UserSerializer(source='from_user')
created_at = serializers.DateTimeField(source='created')
class Meta:
model = Friend
exclude = ('url', 'from_user', 'to_user', 'created',)
So I changed the UserListSerializer to UserSerializer and pasted it.
Was this a big problem? An error occurs.
django version == 1.9.7
django rest framework version == 3.4.1
python3 == 3.5
I'm writing it like this.
urls.py contains router.register(r'friend', views.FriendViewSet, base_name='friend')
The code has been added.
Migrate and runserver processes also work normally, but if you connect to http://127.0.0.1:8000/friend/
DoesNotExist at /friend/
User matching query does not exist
occurs.
Did I do something wrong?
Is it possible to solve it by knowing the model code of friendship? I don't want to post it because it's too long.
Thank you for reading.
django python
matching query does not exist
This usually occurs when objects.get does not find the information.
User.objects.get(blah)
Instead
from django.shortcuts import get_object_or_404
# ...
User.objects.get_object_or_404 (blah)
Use get_object_or_404 to prepare for the case where the data cannot be found.
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