from __future__ import unicode_literals from django.db import models from django.test import TestCase from rest_framework import serializers from tests.models import RESTFrameworkModel # Models class ParentModel(RESTFrameworkModel): name1 = models.CharField(max_length=100) class ChildModel(ParentModel): name2 = models.CharField(max_length=100) class AssociatedModel(RESTFrameworkModel): ref = models.OneToOneField(ParentModel, primary_key=True, on_delete=models.CASCADE) name = models.CharField(max_length=100) # Serializers class DerivedModelSerializer(serializers.ModelSerializer): class Meta: model = ChildModel fields = '__all__' class AssociatedModelSerializer(serializers.ModelSerializer): class Meta: model = AssociatedModel fields = '__all__' # Tests class InheritedModelSerializationTests(TestCase): def test_multitable_inherited_model_fields_as_expected(self): """ Assert that the parent pointer field is not included in the fields serialized fields """ child = ChildModel(name1='parent name', name2='child name') serializer = DerivedModelSerializer(child) assert set(serializer.data) == {'name1', 'name2', 'id'} def test_onetoone_primary_key_model_fields_as_expected(self): """ Assert that a model with a onetoone field that is the primary key is not treated like a derived model """ parent = ParentModel.objects.create(name1='parent name') associate = AssociatedModel.objects.create(name='hello', ref=parent) serializer = AssociatedModelSerializer(associate) assert set(serializer.data) == {'name', 'ref'} def test_data_is_valid_without_parent_ptr(self): """ Assert that the pointer to the parent table is not a required field for input data """ data = { 'name1': 'parent name', 'name2': 'child name', } serializer = DerivedModelSerializer(data=data) assert serializer.is_valid() is True