Django REST Meta data for M2M missing - django

Question

On my json output I don't seem to get key value pairs on my m2m field attribute_answers. see the code below. How to I add in the attribute_answers fields?
json
{
"id": 20,
"name": "Jake",
"active": true,
"type": {
"id": 1,
"name": "Human",
"active": true,
"created": "2013-02-12T13:31:06Z",
"modified": null
},
"user": "jason",
"attribute_answers": [
1,
2
]
}
Serializer
class ProfileSerializer(serializers.ModelSerializer):
user = serializers.SlugRelatedField(slug_field='username')
attribute_answers = serializers.PrimaryKeyRelatedField(many=True)
class Meta:
model = Profile
depth = 2
fields = ('id', 'name', 'active', 'type', 'user', 'attribute_answers')
def restore_object(self, attrs, instance=None):
"""
Create or update a new snippet instance.
"""
if instance:
# Update existing instance
instance.name = attrs.get('name', instance.name)
instance.active = attrs.get('active', instance.active)
instance.type = attrs.get('type', instance.type)
instance.attribute_answers = attrs.get('attribute_answers', instance.attribute_answers)
return instance
# Create new instance
return Profile(**attrs)

Answer 1

If I understand your question correctly, you want a Nested Relationship. In your ProfileSerializer, you'll want:
attribute_answers = AttributeAnswerSerializer(many=True)
This will display all the attributes of each associated attribute_answer model and give you something like:
{
"id": 20,
"name": "Jake",
"active": true,
"type": {
"id": 1,
"name": "Human",
"active": true,
"created": "2013-02-12T13:31:06Z",
"modified": null
},
"user": "jason",
"attribute_answers": [
{"id": 1, "foo": "bar"},
{"id": 2, "foo": "bar2"}
]
}