from __future__ import unicode_literals from django.db import models from django.test import TestCase from rest_framework import serializers from rest_framework.tests.models import ( BlogPost, ManyToManyTarget, ManyToManySource, ForeignKeyTarget, ForeignKeySource, NullableForeignKeySource, OneToOneTarget, NullableOneToOneSource, ) from rest_framework.compat import six # ManyToMany class ManyToManyTargetSerializer(serializers.ModelSerializer): class Meta: model = ManyToManyTarget fields = ('id', 'name', 'sources') class ManyToManySourceSerializer(serializers.ModelSerializer): class Meta: model = ManyToManySource fields = ('id', 'name', 'targets') # ForeignKey class ForeignKeyTargetSerializer(serializers.ModelSerializer): class Meta: model = ForeignKeyTarget fields = ('id', 'name', 'sources') class ForeignKeySourceSerializer(serializers.ModelSerializer): class Meta: model = ForeignKeySource fields = ('id', 'name', 'target') # Nullable ForeignKey class NullableForeignKeySourceSerializer(serializers.ModelSerializer): class Meta: model = NullableForeignKeySource fields = ('id', 'name', 'target') # Nullable OneToOne class NullableOneToOneTargetSerializer(serializers.ModelSerializer): class Meta: model = OneToOneTarget fields = ('id', 'name', 'nullable_source') # TODO: Add test that .data cannot be accessed prior to .is_valid class PKManyToManyTests(TestCase): def setUp(self): for idx in range(1, 4): target = ManyToManyTarget(name='target-%d' % idx) target.save() source = ManyToManySource(name='source-%d' % idx) source.save() for target in ManyToManyTarget.objects.all(): source.targets.add(target) def test_many_to_many_retrieve(self): queryset = ManyToManySource.objects.all() serializer = ManyToManySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'targets': [1]}, {'id': 2, 'name': 'source-2', 'targets': [1, 2]}, {'id': 3, 'name': 'source-3', 'targets': [1, 2, 3]} ] self.assertEqual(serializer.data, expected) def test_reverse_many_to_many_retrieve(self): queryset = ManyToManyTarget.objects.all() serializer = ManyToManyTargetSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'target-1', 'sources': [1, 2, 3]}, {'id': 2, 'name': 'target-2', 'sources': [2, 3]}, {'id': 3, 'name': 'target-3', 'sources': [3]} ] self.assertEqual(serializer.data, expected) def test_many_to_many_update(self): data = {'id': 1, 'name': 'source-1', 'targets': [1, 2, 3]} instance = ManyToManySource.objects.get(pk=1) serializer = ManyToManySourceSerializer(instance, data=data) self.assertTrue(serializer.is_valid()) serializer.save() self.assertEqual(serializer.data, data) # Ensure source 1 is updated, and everything else is as expected queryset = ManyToManySource.objects.all() serializer = ManyToManySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'targets': [1, 2, 3]}, {'id': 2, 'name': 'source-2', 'targets': [1, 2]}, {'id': 3, 'name': 'source-3', 'targets': [1, 2, 3]} ] self.assertEqual(serializer.data, expected) def test_reverse_many_to_many_update(self): data = {'id': 1, 'name': 'target-1', 'sources': [1]} instance = ManyToManyTarget.objects.get(pk=1) serializer = ManyToManyTargetSerializer(instance, data=data) self.assertTrue(serializer.is_valid()) serializer.save() self.assertEqual(serializer.data, data) # Ensure target 1 is updated, and everything else is as expected queryset = ManyToManyTarget.objects.all() serializer = ManyToManyTargetSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'target-1', 'sources': [1]}, {'id': 2, 'name': 'target-2', 'sources': [2, 3]}, {'id': 3, 'name': 'target-3', 'sources': [3]} ] self.assertEqual(serializer.data, expected) def test_many_to_many_create(self): data = {'id': 4, 'name': 'source-4', 'targets': [1, 3]} serializer = ManyToManySourceSerializer(data=data) self.assertTrue(serializer.is_valid()) obj = serializer.save() self.assertEqual(serializer.data, data) self.assertEqual(obj.name, 'source-4') # Ensure source 4 is added, and everything else is as expected queryset = ManyToManySource.objects.all() serializer = ManyToManySourceSerializer(queryset, many=True) self.assertFalse(serializer.fields['targets'].read_only) expected = [ {'id': 1, 'name': 'source-1', 'targets': [1]}, {'id': 2, 'name': 'source-2', 'targets': [1, 2]}, {'id': 3, 'name': 'source-3', 'targets': [1, 2, 3]}, {'id': 4, 'name': 'source-4', 'targets': [1, 3]}, ] self.assertEqual(serializer.data, expected) def test_reverse_many_to_many_create(self): data = {'id': 4, 'name': 'target-4', 'sources': [1, 3]} serializer = ManyToManyTargetSerializer(data=data) self.assertFalse(serializer.fields['sources'].read_only) self.assertTrue(serializer.is_valid()) obj = serializer.save() self.assertEqual(serializer.data, data) self.assertEqual(obj.name, 'target-4') # Ensure target 4 is added, and everything else is as expected queryset = ManyToManyTarget.objects.all() serializer = ManyToManyTargetSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'target-1', 'sources': [1, 2, 3]}, {'id': 2, 'name': 'target-2', 'sources': [2, 3]}, {'id': 3, 'name': 'target-3', 'sources': [3]}, {'id': 4, 'name': 'target-4', 'sources': [1, 3]} ] self.assertEqual(serializer.data, expected) class PKForeignKeyTests(TestCase): def setUp(self): target = ForeignKeyTarget(name='target-1') target.save() new_target = ForeignKeyTarget(name='target-2') new_target.save() for idx in range(1, 4): source = ForeignKeySource(name='source-%d' % idx, target=target) source.save() def test_foreign_key_retrieve(self): queryset = ForeignKeySource.objects.all() serializer = ForeignKeySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'target': 1}, {'id': 2, 'name': 'source-2', 'target': 1}, {'id': 3, 'name': 'source-3', 'target': 1} ] self.assertEqual(serializer.data, expected) def test_reverse_foreign_key_retrieve(self): queryset = ForeignKeyTarget.objects.all() serializer = ForeignKeyTargetSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'target-1', 'sources': [1, 2, 3]}, {'id': 2, 'name': 'target-2', 'sources': []}, ] self.assertEqual(serializer.data, expected) def test_foreign_key_update(self): data = {'id': 1, 'name': 'source-1', 'target': 2} instance = ForeignKeySource.objects.get(pk=1) serializer = ForeignKeySourceSerializer(instance, data=data) self.assertTrue(serializer.is_valid()) self.assertEqual(serializer.data, data) serializer.save() # Ensure source 1 is updated, and everything else is as expected queryset = ForeignKeySource.objects.all() serializer = ForeignKeySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'target': 2}, {'id': 2, 'name': 'source-2', 'target': 1}, {'id': 3, 'name': 'source-3', 'target': 1} ] self.assertEqual(serializer.data, expected) def test_foreign_key_update_incorrect_type(self): data = {'id': 1, 'name': 'source-1', 'target': 'foo'} instance = ForeignKeySource.objects.get(pk=1) serializer = ForeignKeySourceSerializer(instance, data=data) self.assertFalse(serializer.is_valid()) self.assertEqual(serializer.errors, {'target': ['Incorrect type. Expected pk value, received %s.' % six.text_type.__name__]}) def test_reverse_foreign_key_update(self): data = {'id': 2, 'name': 'target-2', 'sources': [1, 3]} instance = ForeignKeyTarget.objects.get(pk=2) serializer = ForeignKeyTargetSerializer(instance, data=data) self.assertTrue(serializer.is_valid()) # We shouldn't have saved anything to the db yet since save # hasn't been called. queryset = ForeignKeyTarget.objects.all() new_serializer = ForeignKeyTargetSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'target-1', 'sources': [1, 2, 3]}, {'id': 2, 'name': 'target-2', 'sources': []}, ] self.assertEqual(new_serializer.data, expected) serializer.save() self.assertEqual(serializer.data, data) # Ensure target 2 is update, and everything else is as expected queryset = ForeignKeyTarget.objects.all() serializer = ForeignKeyTargetSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'target-1', 'sources': [2]}, {'id': 2, 'name': 'target-2', 'sources': [1, 3]}, ] self.assertEqual(serializer.data, expected) def test_foreign_key_create(self): data = {'id': 4, 'name': 'source-4', 'target': 2} serializer = ForeignKeySourceSerializer(data=data) self.assertTrue(serializer.is_valid()) obj = serializer.save() self.assertEqual(serializer.data, data) self.assertEqual(obj.name, 'source-4') # Ensure source 4 is added, and everything else is as expected queryset = ForeignKeySource.objects.all() serializer = ForeignKeySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'target': 1}, {'id': 2, 'name': 'source-2', 'target': 1}, {'id': 3, 'name': 'source-3', 'target': 1}, {'id': 4, 'name': 'source-4', 'target': 2}, ] self.assertEqual(serializer.data, expected) def test_reverse_foreign_key_create(self): data = {'id': 3, 'name': 'target-3', 'sources': [1, 3]} serializer = ForeignKeyTargetSerializer(data=data) self.assertTrue(serializer.is_valid()) obj = serializer.save() self.assertEqual(serializer.data, data) self.assertEqual(obj.name, 'target-3') # Ensure target 3 is added, and everything else is as expected queryset = ForeignKeyTarget.objects.all() serializer = ForeignKeyTargetSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'target-1', 'sources': [2]}, {'id': 2, 'name': 'target-2', 'sources': []}, {'id': 3, 'name': 'target-3', 'sources': [1, 3]}, ] self.assertEqual(serializer.data, expected) def test_foreign_key_update_with_invalid_null(self): data = {'id': 1, 'name': 'source-1', 'target': None} instance = ForeignKeySource.objects.get(pk=1) serializer = ForeignKeySourceSerializer(instance, data=data) self.assertFalse(serializer.is_valid()) self.assertEqual(serializer.errors, {'target': ['This field is required.']}) def test_foreign_key_with_empty(self): """ Regression test for #1072 https://github.com/tomchristie/django-rest-framework/issues/1072 """ serializer = NullableForeignKeySourceSerializer() self.assertEqual(serializer.data['target'], None) class PKNullableForeignKeyTests(TestCase): def setUp(self): target = ForeignKeyTarget(name='target-1') target.save() for idx in range(1, 4): if idx == 3: target = None source = NullableForeignKeySource(name='source-%d' % idx, target=target) source.save() def test_foreign_key_retrieve_with_null(self): queryset = NullableForeignKeySource.objects.all() serializer = NullableForeignKeySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'target': 1}, {'id': 2, 'name': 'source-2', 'target': 1}, {'id': 3, 'name': 'source-3', 'target': None}, ] self.assertEqual(serializer.data, expected) def test_foreign_key_create_with_valid_null(self): data = {'id': 4, 'name': 'source-4', 'target': None} serializer = NullableForeignKeySourceSerializer(data=data) self.assertTrue(serializer.is_valid()) obj = serializer.save() self.assertEqual(serializer.data, data) self.assertEqual(obj.name, 'source-4') # Ensure source 4 is created, and everything else is as expected queryset = NullableForeignKeySource.objects.all() serializer = NullableForeignKeySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'target': 1}, {'id': 2, 'name': 'source-2', 'target': 1}, {'id': 3, 'name': 'source-3', 'target': None}, {'id': 4, 'name': 'source-4', 'target': None} ] self.assertEqual(serializer.data, expected) def test_foreign_key_create_with_valid_emptystring(self): """ The emptystring should be interpreted as null in the context of relationships. """ data = {'id': 4, 'name': 'source-4', 'target': ''} expected_data = {'id': 4, 'name': 'source-4', 'target': None} serializer = NullableForeignKeySourceSerializer(data=data) self.assertTrue(serializer.is_valid()) obj = serializer.save() self.assertEqual(serializer.data, expected_data) self.assertEqual(obj.name, 'source-4') # Ensure source 4 is created, and everything else is as expected queryset = NullableForeignKeySource.objects.all() serializer = NullableForeignKeySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'target': 1}, {'id': 2, 'name': 'source-2', 'target': 1}, {'id': 3, 'name': 'source-3', 'target': None}, {'id': 4, 'name': 'source-4', 'target': None} ] self.assertEqual(serializer.data, expected) def test_foreign_key_update_with_valid_null(self): data = {'id': 1, 'name': 'source-1', 'target': None} instance = NullableForeignKeySource.objects.get(pk=1) serializer = NullableForeignKeySourceSerializer(instance, data=data) self.assertTrue(serializer.is_valid()) self.assertEqual(serializer.data, data) serializer.save() # Ensure source 1 is updated, and everything else is as expected queryset = NullableForeignKeySource.objects.all() serializer = NullableForeignKeySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'target': None}, {'id': 2, 'name': 'source-2', 'target': 1}, {'id': 3, 'name': 'source-3', 'target': None} ] self.assertEqual(serializer.data, expected) def test_foreign_key_update_with_valid_emptystring(self): """ The emptystring should be interpreted as null in the context of relationships. """ data = {'id': 1, 'name': 'source-1', 'target': ''} expected_data = {'id': 1, 'name': 'source-1', 'target': None} instance = NullableForeignKeySource.objects.get(pk=1) serializer = NullableForeignKeySourceSerializer(instance, data=data) self.assertTrue(serializer.is_valid()) self.assertEqual(serializer.data, expected_data) serializer.save() # Ensure source 1 is updated, and everything else is as expected queryset = NullableForeignKeySource.objects.all() serializer = NullableForeignKeySourceSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'source-1', 'target': None}, {'id': 2, 'name': 'source-2', 'target': 1}, {'id': 3, 'name': 'source-3', 'target': None} ] self.assertEqual(serializer.data, expected) # reverse foreign keys MUST be read_only # In the general case they do not provide .remove() or .clear() # and cannot be arbitrarily set. # def test_reverse_foreign_key_update(self): # data = {'id': 1, 'name': 'target-1', 'sources': [1]} # instance = ForeignKeyTarget.objects.get(pk=1) # serializer = ForeignKeyTargetSerializer(instance, data=data) # self.assertTrue(serializer.is_valid()) # self.assertEqual(serializer.data, data) # serializer.save() # # Ensure target 1 is updated, and everything else is as expected # queryset = ForeignKeyTarget.objects.all() # serializer = ForeignKeyTargetSerializer(queryset, many=True) # expected = [ # {'id': 1, 'name': 'target-1', 'sources': [1]}, # {'id': 2, 'name': 'target-2', 'sources': []}, # ] # self.assertEqual(serializer.data, expected) class PKNullableOneToOneTests(TestCase): def setUp(self): target = OneToOneTarget(name='target-1') target.save() new_target = OneToOneTarget(name='target-2') new_target.save() source = NullableOneToOneSource(name='source-1', target=new_target) source.save() def test_reverse_foreign_key_retrieve_with_null(self): queryset = OneToOneTarget.objects.all() serializer = NullableOneToOneTargetSerializer(queryset, many=True) expected = [ {'id': 1, 'name': 'target-1', 'nullable_source': None}, {'id': 2, 'name': 'target-2', 'nullable_source': 1}, ] self.assertEqual(serializer.data, expected) # The below models and tests ensure that serializer fields corresponding # to a ManyToManyField field with a user-specified ``through`` model are # set to read only class ManyToManyThroughTarget(models.Model): name = models.CharField(max_length=100) class ManyToManyThrough(models.Model): source = models.ForeignKey('ManyToManyThroughSource') target = models.ForeignKey(ManyToManyThroughTarget) class ManyToManyThroughSource(models.Model): name = models.CharField(max_length=100) targets = models.ManyToManyField(ManyToManyThroughTarget, related_name='sources', through='ManyToManyThrough') class ManyToManyThroughTargetSerializer(serializers.ModelSerializer): class Meta: model = ManyToManyThroughTarget fields = ('id', 'name', 'sources') class ManyToManyThroughSourceSerializer(serializers.ModelSerializer): class Meta: model = ManyToManyThroughSource fields = ('id', 'name', 'targets') class PKManyToManyThroughTests(TestCase): def setUp(self): self.source = ManyToManyThroughSource.objects.create( name='through-source-1') self.target = ManyToManyThroughTarget.objects.create( name='through-target-1') def test_many_to_many_create(self): data = {'id': 2, 'name': 'source-2', 'targets': [self.target.pk]} serializer = ManyToManyThroughSourceSerializer(data=data) self.assertTrue(serializer.fields['targets'].read_only) self.assertTrue(serializer.is_valid()) obj = serializer.save() self.assertEqual(obj.name, 'source-2') self.assertEqual(obj.targets.count(), 0) def test_many_to_many_reverse_create(self): data = {'id': 2, 'name': 'target-2', 'sources': [self.source.pk]} serializer = ManyToManyThroughTargetSerializer(data=data) self.assertTrue(serializer.fields['sources'].read_only) self.assertTrue(serializer.is_valid()) serializer.save() obj = serializer.save() self.assertEqual(obj.name, 'target-2') self.assertEqual(obj.sources.count(), 0) # Regression tests for #694 (`source` attribute on related fields) class PrimaryKeyRelatedFieldSourceTests(TestCase): def test_related_manager_source(self): """ Relational fields should be able to use manager-returning methods as their source. """ BlogPost.objects.create(title='blah') field = serializers.PrimaryKeyRelatedField(many=True, source='get_blogposts_manager') class ClassWithManagerMethod(object): def get_blogposts_manager(self): return BlogPost.objects obj = ClassWithManagerMethod() value = field.field_to_native(obj, 'field_name') self.assertEqual(value, [1]) def test_related_queryset_source(self): """ Relational fields should be able to use queryset-returning methods as their source. """ BlogPost.objects.create(title='blah') field = serializers.PrimaryKeyRelatedField(many=True, source='get_blogposts_queryset') class ClassWithQuerysetMethod(object): def get_blogposts_queryset(self): return BlogPost.objects.all() obj = ClassWithQuerysetMethod() value = field.field_to_native(obj, 'field_name') self.assertEqual(value, [1]) def test_dotted_source(self): """ Source argument should support dotted.source notation. """ BlogPost.objects.create(title='blah') field = serializers.PrimaryKeyRelatedField(many=True, source='a.b.c') class ClassWithQuerysetMethod(object): a = { 'b': { 'c': BlogPost.objects.all() } } obj = ClassWithQuerysetMethod() value = field.field_to_native(obj, 'field_name') self.assertEqual(value, [1])