django REST framework - limited queryset for nested ModelSerializer?
In your View Set you may specify the queryset like follows:
from rest_framework import serializers, viewsets
class MyModelSerializer(serializers.ModelSerializer):
class Meta:
model = MyModel
class MyModelViewSet(viewsets.ModelViewSet):
queryset = MyModel.objects.all()[:500]
serializer_class = MyModelSerializer
I think what you are looking for is the SerializerMethodField
.
So your code would look as follows:
class ContainerSerializer(serializers.ModelSerializer):
items = SerializerMethodField('get_items')
class Meta:
model = Container
fields = ('size', 'shape', 'items')
def get_items(self, container):
items = Item.objects.filter(container=container)[:500] # Whatever your query may be
serializer = ItemSerializer(instance=items, many=True)
return serializer.data
The one catch is that the SerializerMethodField
is read only.
You may use source parameter
class Container(models.Model):
...
def get_items(self):
return self.items[:500]
and in serializer
items = ItemSerializer(many=True, source='get_items', )