Django doesn't provide id in forms or serializers.

gistfile1.txt

Manually provide the id with:

# forms.py
class SomethingForm(...):
    id = forms.IntegerField(min_value=0)

# serializers.py
class SetIDFieldFromModel:
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        model_id_field = self.Meta.model._meta.get_field('id')
        self.fields['id'] = serializers.ModelField(model_field=model_id_field,
                                                   required=False)