Django rest framework use kwargs in serializer - django

Question

I have a model Ingredient which has ForeignKey field. I use modelSerializer to pass data. I'm passing recipe_id in url like this recipes/{recipe.id}/ingredients. My current solution is to modify request.data in the view but I'm sure if it's corrent way for such a common case.
What's the best way to pass Recipe to serializer?
models.py
class Ingredient(TimeStamp):
name = models.CharField(max_length=50)
quantity = models.PositiveSmallIntegerField()
recipe = models.ForeignKey(
Recipe,
on_delete=models.CASCADE,
related_name='ingredients',
)
serializers.py
class IngredientSerializer(serializers.ModelSerializer):
class Meta:
model = Ingredient
fields = [
'id',
'name',
'quantity',
'unit',
'recipe'
]
views.py
class IngredientViewSet(viewsets.ModelViewSet):
serializer_class = IngredientSerializer
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data)
request.data['recipe'] = self.kwargs['pk']
serializer.is_valid(raise_exception=True)
self.perform_create(serializer)
headers = self.get_success_headers(serializer.data)
return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)

Answer 1

don't forget to pass the serializer the context dict
you can create your own or get the default one:
context = self.get_serializer_context()
serializer = self.get_serializer(data=request.data, context=context)
if you'll at the source code for get_serializer_context:
def get_serializer_context(self):
"""
Extra context provided to the serializer class.
"""
return {
'request': self.request,
'format': self.format_kwarg,
'view': self
}
it adds the view class and the request to the serializer context.
in the serializer, I override the create method and pass the creation data dict the related object id.
class S(ModelSerializer):
def create(self, validated_data):
validated_data['recipe_id'] = self.kwargs['pk']
return super(S, self).create(validated_data)
and no need to override the create of the view