Django Rest Framework - Read nested data, write integer

Question

So far I\'m extremely happy with Django Rest Framework, which is why I alsmost can\'t believe there\'s such a large omission in the codebase. Hopefully someone knows of a wa

Answer 1

I create a Field type that tries to solve the problem of the Data Save requests with its ForeignKey in Integer, and the requests to read data with nested data

This is the class:

class NestedRelatedField(serializers.PrimaryKeyRelatedField):
"""
    Model identical to PrimaryKeyRelatedField but its
    representation will be nested and its input will
    be a primary key.
"""

def __init__(self, **kwargs):
    self.pk_field = kwargs.pop('pk_field', None)
    self.model = kwargs.pop('model', None)
    self.serializer_class = kwargs.pop('serializer_class', None)
    super().__init__(**kwargs)

def to_representation(self, data):
    pk = super(NestedRelatedField, self).to_representation(data)
    try:
        return self.serializer_class(self.model.objects.get(pk=pk)).data
    except self.model.DoesNotExist:
        return None

def to_internal_value(self, data):
    return serializers.PrimaryKeyRelatedField.to_internal_value(self, data)

And so it would be used:

class PostModelSerializer(serializers.ModelSerializer):

    message = NestedRelatedField(
         queryset=MessagePrefix.objects.all(),
         model=MessagePrefix,
         serializer_class=MessagePrefixModelSerializer
   )

I hope this helps you.