How do I do a post request with related serializers Django rest framework

I have model Package with Supplier and PackageSize, foreign keys and a field to which is also a foreign key of a Shipping model which contains where the supplier wants to ship the package so to make sure I a user can submit the whole information in one request, I created my serializers and linked them like such.

serializers.py

from users.models import Supplier  from packages.models import Package , PackageSize , ShippingLocation , Shipping        class ShippingLocationSerializer(serializers.ModelSerializer):          class Meta:              model= ShippingLocation              fields = ['latitude','longitude']          def create(self, validated_data):              return ShippingLocation(**validated_data)        class PackageSizeSerializer(serializers.ModelSerializer):          class Meta:              model= PackageSize              fields = ['length', 'width' ,'height' ,'weight']          def create(self, validated_data):              """              docstring              """              pass        class ShippingSerializer(serializers.ModelSerializer):          location = ShippingLocationSerializer(source='location_set')          class Meta:              model = Shipping              fields = [                  'first_name',                   'last_name',                  'phone_number',                  'email',                  'street_address',                  'village',                  'district',                  'country',                  'location'                  ]          def create(self, validated_data):              """              docstring              """              pass        class SupplierPackageSerializer(serializers.ModelSerializer):          size = PackageSizeSerializer(source='size_set')          shipping_location= ShippingSerializer(source='to_set')          class Meta:              model = Package              fields = ['supplier', 'name', 'size', 'shipping_location', ]              read_only_fields = ['supplier']                    def create(self, validated_data):              user =Supplier.objects.get(username=self.context['request'].user)              return Package(supplier=user, **validated_data )  

and created my views like such

view.py

from rest_framework import generics  from packages.models import Package  from .serializers import , SupplierPackageSerializer  from rest_framework.permissions import IsAuthenticated    class SupplierPackageViewSet(generics.ListCreateAPIView):      serializer_class = SupplierPackageSerializer      queryset = Package.objects.all().order_by('-name')      permission_classes = [IsAuthenticated]        

models.py

from django.db import models      from django.conf import settings  from users.models import Supplier    class ShippingLocation(models.Model):      latitude = models.IntegerField()      longitude = models.IntegerField()    class Shipping (models.Model):      first_name = models.CharField(max_length=30)      last_name = models.CharField(max_length=30)      phone_number =  models.CharField(max_length=14)      email = models.EmailField()      street_address = models.CharField(max_length=30)      village = models.CharField(max_length=30)      district = models.CharField(max_length=30)      country = models.CharField(max_length=30)      location = models.OneToOneField(ShippingLocation , default=None, on_delete=models.CASCADE )        # Returns the string representation of the model.      def __str__(self):          return self.email    class PackageSize(models.Model):      length = models.IntegerField()      width = models.IntegerField()      height = models.IntegerField()      weight = models.IntegerField()    # Create your models here.  class Package(models.Model):      TYPE = (          ('1', 'Envelope'),          ('2', 'Parcel'),          ('2', 'Soft'),          ('2', 'Freezed'),      )      TYPE = (          ('1', 'CREATED IN SYSTEM'),          ('2', ''),          ('2', 'Soft'),          ('2', 'Freezed'),      )      name = models.CharField(max_length=30)      supplier = models.ForeignKey( Supplier , on_delete=models.DO_NOTHING)      to =  models.ForeignKey(Shipping, default=None, on_delete=models.CASCADE )      size = models.ForeignKey( PackageSize, default=None, on_delete=models.CASCADE )      type = models.CharField(max_length=1, default="1", choices=TYPE)            def __str__(self):          return self.name  

the challenge is when I submit the data it is validated very well but it cannot be saved and I get this error

TypeError at /supplier/package  Package() got an unexpected keyword argument 'size_set'  

https://stackoverflow.com/questions/65588734/how-do-i-do-a-post-request-with-related-serializers-django-rest-framework January 06, 2021 at 08:57AM