Hi,

I'm currently working on a project using django-rest-framework-json-api, and I have a use case where I need to include an extra attribute within the data objects in a relationship. Here’s an example of what I'm trying to achieve:

"relationships": {    "responsible_supplier": {        "data": [{            "type": "supplier",            "id": "c00f7b66-6768-4b42-b72e-bf2b018210c5",            "level": 1        }, {            "type": "supplier",            "id": "8999d741-29ed-4d07-b228-7aa79b43d9a7",            "level": 2        }]    }}

I'm looking to add a level field for each supplier within the relationships section. However, from what I understand, JSON
only supports type and id fields directly in the data objects.

Here's how I am currently resolving this with my serializers:

class ResponsibleSupplierSerializer(ModelSerializer):    id = PrimaryKeyRelatedField(queryset=Supplier.objects.all())    level = IntegerField(min_value=1, write_only=True)    class Meta:        model = ResponsibleSupplier        fields = ['id', 'level']

class MaintenanceSerializer(ModelSerializer):    responsible_suppliers = ResourceRelatedField(many=True, queryset=Supplier.objects.all())

I was wondering if anyone else has encountered a similar requirement and how you approached it. Are there any workarounds or best practices to include additional attributes like level within relationships, while still adhering to the JSON
specification?

Thanks.