Django REST framework: Can a nested object access its parent object's details in a List View?

Question

I am attempting to implement a nested resource where one of its fields depends on a value from its parent resource.

Suppose we are building a system for a company which

Answer 1

Moment of clarity: the solution is to use a SerializerMethodField to instantiate the RepSummarySerializer and pass the customer_id in the context:

class CustomerSummarySerializer(serializers.HyperlinkedModelSerializer):
    id = ...
    name = ...
    rep = serializers.SerializerMethodField('get_rep')


    def get_rep(self, obj):
        rep = obj.rep
        serializer_context = {'request': self.context.get('request'),
                              'customer_id': obj.id}
        serializer = RepSummarySerializer(rep, context=serializer_context)
        return serializer.data

The customer_id can now be accessed in RepSummarySerializer.get_rep_url like this:

def get_rep_url(self, obj):
    customer_id = self.context.get('customer_id')
    ...

Don't know why I didn't think of this three hours ago.