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test_relations_slug.py
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from django.test import TestCase
from rest_framework import serializers
from rest_framework.tests.models import NullableForeignKeySource, ForeignKeySource, ForeignKeyTarget
class ForeignKeyTargetSerializer(serializers.ModelSerializer):
sources = serializers.SlugRelatedField(many=True, slug_field='name')
class Meta:
model = ForeignKeyTarget
class ForeignKeySourceSerializer(serializers.ModelSerializer):
target = serializers.SlugRelatedField(slug_field='name')
class Meta:
model = ForeignKeySource
class NullableForeignKeySourceSerializer(serializers.ModelSerializer):
target = serializers.SlugRelatedField(slug_field='name', required=False)
class Meta:
model = NullableForeignKeySource
# TODO: M2M Tests, FKTests (Non-nullable), One2One
class SlugForeignKeyTests(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': 'target-1'},
{'id': 2, 'name': 'source-2', 'target': 'target-1'},
{'id': 3, 'name': 'source-3', 'target': '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': ['source-1', 'source-2', 'source-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': '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': 'target-2'},
{'id': 2, 'name': 'source-2', 'target': 'target-1'},
{'id': 3, 'name': 'source-3', 'target': 'target-1'}
]
self.assertEqual(serializer.data, expected)
def test_foreign_key_update_incorrect_type(self):
data = {'id': 1, 'name': 'source-1', 'target': 123}
instance = ForeignKeySource.objects.get(pk=1)
serializer = ForeignKeySourceSerializer(instance, data=data)
self.assertFalse(serializer.is_valid())
self.assertEqual(serializer.errors, {'target': ['Object with name=123 does not exist.']})
def test_reverse_foreign_key_update(self):
data = {'id': 2, 'name': 'target-2', 'sources': ['source-1', 'source-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': ['source-1', 'source-2', 'source-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': ['source-2']},
{'id': 2, 'name': 'target-2', 'sources': ['source-1', 'source-3']},
]
self.assertEqual(serializer.data, expected)
def test_foreign_key_create(self):
data = {'id': 4, 'name': 'source-4', 'target': 'target-2'}
serializer = ForeignKeySourceSerializer(data=data)
serializer.is_valid()
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': 'target-1'},
{'id': 2, 'name': 'source-2', 'target': 'target-1'},
{'id': 3, 'name': 'source-3', 'target': 'target-1'},
{'id': 4, 'name': 'source-4', 'target': 'target-2'},
]
self.assertEqual(serializer.data, expected)
def test_reverse_foreign_key_create(self):
data = {'id': 3, 'name': 'target-3', 'sources': ['source-1', 'source-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': ['source-2']},
{'id': 2, 'name': 'target-2', 'sources': []},
{'id': 3, 'name': 'target-3', 'sources': ['source-1', 'source-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.']})
class SlugNullableForeignKeyTests(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': 'target-1'},
{'id': 2, 'name': 'source-2', 'target': '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': 'target-1'},
{'id': 2, 'name': 'source-2', 'target': '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': 'target-1'},
{'id': 2, 'name': 'source-2', 'target': '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': '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': 'target-1'},
{'id': 3, 'name': 'source-3', 'target': None}
]
self.assertEqual(serializer.data, expected)