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How i can to filter queryset by current user in django rest framework

class SalonCarDetailsSerializer(serializers.ModelSerializer):
salon = PrimaryKeyRelatedField(queryset=Salon.objects.filter(owner=?))
class Meta:
model = SalonCarDetails
fields = ["salon", "car", "price", "number_of_cars"]
CurrentUserDefault() doesn't works

Well, you could write your own PrimaryKeyRelated field like that:
class SalonKeyRelatedField(serializers.PrimaryKeyRelatedField):
def get_queryset(self):
qs = super().get_queryset()
request = self.context.get('request')
return qs
then you can filter qs by request.user, this will be called only on POST and PUT requests. You can then include it in your serializer
salon = SalonKeyRelatedField()
don't forget to include salon in your fields

I wish I could see your views.py, but anyway I make some assumptions about it and put it in the class implementation scenario.
#
### views.py
#
# Django native libraries
from rest_framework.serializers import Serializer
from rest_framework import viewsets, mixins, status
from django.db.models import Q
# your serializer and model
from .serializers import YourSalonCarSerializer
from .models import SalonCarDetails
class YourCustomViewSet(mixins.RetrieveModelMixin,
mixins.ListModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
viewsets.GenericViewSet):
queryset = SalonCarDetails.objects.all()
serializer_class = YourSalonCarSerializer
def get_queryset(self):
if self.request.user.is_anonymous:
return []
lookups = Q(user=self.request.user)
queryset = self.queryset.filter(lookups)

only vaildation in Django Rest Framework

Can I use Serializer just for validation purpose?
for example if I had CommentSerializer as
from rest_framework import serializers
class CommentSerializer(serializers.Serializer):
email = serializers.EmailField()
content = serializers.CharField(max_length=200)
created = serializers.DateTimeField()
Is it as as per motive of DRF to use this serializer just for validation of request or some data without refering to any Django models? For example:
from rest_framework.views import APIView
from rest_framework.response import Response
class MyAPIView(APIView):
def post(self, request, format=None):
serializer = CommentSerializer(data=dict(request.data))
if serializer.is_valid():
validated_data = serializer.validated_data
# do something with validated_data
# return some data as Response()
or am I fighting against the framework guidance?

validated_data is empty when making POST request with Django REST

I'm trying to create a new entry in my database with Django REST framework and I am able to successfully send a request however validated_data is empty:
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.shortcuts import render
from rest_framework import viewsets
from django.shortcuts import get_object_or_404, get_list_or_404
from .models import GetPurchases, CarFax
from .serializers import PurchasesSerializer
from .serializers import CarFaxSerializer
from rest_framework.response import Response
# Create your views here.
class GetCarFax(viewsets.ModelViewSet):
''' This view will be used for POSTing new carfax reports to the database '''
queryset = CarFax.objects.all()
serializer_class = CarFaxSerializer
# authentication_classes = []
permission_classes = []
#print('TEST')
def list(self, request):
# accessed at url: ^api/v1/carfax/$
queryset = CarFax.objects.all()
serializer = CarFaxSerializer(queryset, many=True)
return Response(serializer.data)
def retrieve(self, request, pk=None, *args, **kwargs):
# accessed at url: ^api/v1/retrieve/{pk}/$
queryset = CarFax.objects.all()
record = get_list_or_404(queryset, vin__exact=pk)
serializer = CarFaxSerializer(record, many=True)
return Response(serializer.data)
def create(self, request, **validated_data):
print('TEST')
print(request.data)
print(validated_data)
serializer = CarFaxSerializer(CarFax.objects.create(**validated_data))
headers = self.get_success_headers(serializer.data)
print(serializer.data)
print(headers)
return Response(serializer.data, headers=headers)
serializers.py
class CarFaxSerializer(serializers.ModelSerializer):
class Meta:
model = CarFax
fields = ('vin', 'structural_damage', 'total_loss',
'accident', 'airbags', 'odometer', 'recalls',
'last_updated')
When I print request.data I can see the data I sent. However validated_data is empty, which is the dict I'm using to create the models.

The accepted answer is a nice refactoring but it doesn't answer the question, and thus may not help future readers (like myself, who just went through this). The real reason validated data was empty was because the when you override .create on the ModelViewSet you wipe out the serializer model field bindings and have to explicitly specify them as you would on a regular serializer.
CarFax serializer should have been defined like so:
class CarFaxSerializer(serializers.ModelSerializer):
vin = serializers.CharField(23),
structural_damage = serializers.BooleanField(),
total_loss = serializers.BooleanField(),
accident = serializers.BooleanField(),
airbags = serializers.BooleanField(),
odometer = serializers.IntegerField(),
recalls = serialziers.BooleanField(),
last_updated = serializers.DateField(),
class Meta:
model = CarFax
fields = ('vin', 'structural_damage', 'total_loss',
'accident', 'airbags', 'odometer', 'recalls',
'last_updated')

First of all, your GetCarFax class seems like messy :( because you'd override most of the methods, but it doesn't provide any advantages to the view. So change your GetCarFax view class to below,
class GetCarFax(viewsets.ModelViewSet):
"""
This view will be used for POSTing new carfax reports to the database
"""
queryset = CarFax.objects.all()
serializer_class = CarFaxSerializer
# authentication_classes = []
permission_classes = []
lookup_field = 'myfieldname'
This few lines of code will handle all the CRUD operations for you :)

Django Rest Framework unable to parse multipart/form data

As stated in DRF documentation http://www.django-rest-framework.org/api-guide/parsers/#multipartparser, in order to parse multipart/form-data, the MultiPart and form parser must be used. I have a supiscion this is a problem in the Django Rest Framework because I saw a solution on their github issue saying it work using APIView.
from django.contrib.auth.models import User
from rest_framework import viewsets
from api.serializers import UserSerializer,
from rest_framework.parsers import MultiPartParser, FormParser
from rest_framework.response import Response
from rest_framework import status
class UserViewSet(viewsets.ModelViewSet):
"""
API endpoint that allows users to be viewed or edited.
"""
queryset = User.objects.all()
parser_classes = (MultiPartParser, FormParser)
serializer_class = UserSerializer
Picture of me sending request to Postman with result:
Edit: Adding UserSerializer class
class UserSerializer(serializers.HyperlinkedModelSerializer):
snapcapsules = SnapCapsuleSerializer(
many=True,
read_only=True,
allow_null=True,
)
class Meta:
model = User
fields = ('snapcapsules', 'url', 'username', 'email', 'password', )
write_only_fields = ('password',)
def create(self, validated_data):
user = User.objects.create(
username=validated_data['username'],
email=validated_data['email'],
)
user.set_password(validated_data['password'])
user.save()
return user
def update(self, instance, validated_data):
capsules_data = validated_data.pop('snapcapsules')
for capsule in capsules_data:
SnapCapsule.objects.create(user=instance, **capsule)
return instance

This is might not the issue with the ContentType. The error response says that,the UserSerializer excpect a payloadordata which include username and password field
So, Please try to add those fields to the request body and try again
UPDATE
The problem with the Orginal Post was, he added extra headers in POSTMAN (see the pic below) .
Postman will add appropriate Headers aromatically for you. So, you don't have to explicitly mention it

I removed one line and then it worked!
class UserViewSet(viewsets.ModelViewSet):
"""
API endpoint that allows users to be viewed or edited.
"""
queryset = User.objects.all()
serializer_class = UserSerializer
Also, the serializer can be rewrite as follows:
class UserSerializer(serializers.HyperlinkedModelSerializer):
...
def create(self, validated_data):
return User.objects.create_user(
username=validated_data['username'],
email=validated_data['email'],
password=validated_data['password']
)
...

API call to update a field of an object

So I have an model serializer which consists of
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ('id', 'name', 'description')
This is my ViewSet
class UserViewSet(viewsets.ModelViewSet):
queryset = User.objects.all()
serializer_class = UserSerializer
This is my URLs.py file:
from django.conf.urls import include, url
from rest_framework import routers
import views
router = DefaultRouter()
router.register('user', views.UserViewSet)
urlpatterns = [
url(r'^', include(router.urls)),
url(r'^login/', include('rest_framework.urls', namespace='rest_framework'))
]
Using the serializer, I can make it print out the objects inside my database. If I have the object PK/ID, I want to be able to update the field id or name of the object. Is there a way I can do that with a patch/post request using the serializer? I'm new to this so I'd love it if someone can help me out with this.
I'm thinking of just doing a POST request, then have it do this:
user = User.objects.get(id=id)
user.name = "XXXXX"
user.save()
But I want to do this using the serializer, using a PATCH request.

the below code will help to you,
**filename : views.py**
from user.models import User
from users.serializers import UserSerializer
from django.http import Http404
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
class UserList(APIView):
"""
List all users, or create a new user.
"""
def get(self, request, format=None):
users = User.objects.all()
serializer = UserSerializer(users, many=True)
return Response(serializer.data)
def post(self, request, format=None):
serializer = UserSerializer(data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data, status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
class UserDetail(APIView):
"""
Retrieve, update or delete a user instance.
"""
def get_object(self, pk):
try:
return User.objects.get(pk=pk)
except User.DoesNotExist:
raise Http404
def get(self, request, pk, format=None):
user = self.get_object(pk)
serializer = UserSerializer(user)
return Response(serializer.data)
def put(self, request, pk, format=None):
user = self.get_object(pk)
serializer = UserSerializer(user, data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def delete(self, request, pk, format=None):
user = self.get_object(pk)
user.delete()
return Response(status=status.HTTP_204_NO_CONTENT)
**filename : urls.py**
from django.conf.urls import url
from rest_framework.urlpatterns import format_suffix_patterns
from users import views
urlpatterns = [
url(r'^users/$', views.UserList.as_view()),
url(r'^user/(?P<pk>[0-9]+)/$', views.UserDetail.as_view()),
]
urlpatterns = format_suffix_patterns(urlpatterns)
Reference : http://www.django-rest-framework.org/tutorial/3-class-based-views/

Django rest framework comes with some pre-defined concrete generic views such as UpdateAPIView, RetrieveUpdateAPIView.
First you need to create a view for user which uses one of the views which can update. The update views provides handlers for patch method on the view.
RetrieveUpdateAPIView
Used for read or update endpoints to represent a single model instance.
Provides get, put and patch method handlers.
Now, use this to create a view:
class UserDetail(generics.RetrieveUpdateAPIView):
queryset = User.objects.all()
serializer_class = UserSerializer
To access this view you need to have a url which uses user's primary key to access the user:
url(r'users/(?P<pk>\d+)/$', UserDetail.as_view(), name='api-user-detail'),
Then using PATCH call you can update the user's name.

Since you're using a ModelViewset, this capability should be built in. If you use the browsable API to navigate to /user/<pk>/, you'll see the operations you can perform on that object. By default, a ModelViewset provides list(), retrieve(), create(), update(), and destroy() capability.
http://www.django-rest-framework.org/api-guide/viewsets/#modelviewset
You can also override any or all of the provided methods, however an update of a single object is built in to DRF ModelViewsets. Use curl to try a PATCH to /user/<pk>/ with the information you'd like to update.