Rest API Django does not work

Question

I have a problem in Python/Django. The tables school and school_application_info are related. However, there is no record of any school_id in school_application_info. So I added null=True, blank=True staying that way:

school = models.OneToOneField(School, related_name='school_application_info', null=True, blank=True)

Then I did the Django Migrations commands:

./manage.py makemigrations
./manage.py migrate 

But it is not working and generates an error:

SchoolViewSet: ErrorResponse - status:400, resp:{'school_application_info': [u'This field may not be null.']}

Answer 1

PrimaryKeyRelatedField can be used to represent the relation using your primary key:

class SchoolSerializer(serializers.ModelSerializer):
    school_application_info = serializers.PrimaryKeyRelatedField(allow_null=True)

    class Meta:
         model = School

The argument allow_null if defined as True, the field will accept Null values or empty strings for null relationships. The default is False.

See in the documentation