mirror of
https://github.com/encode/django-rest-framework.git
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f323049ecc
* Add callable/prop tests for pk-only optimization * Fix related field pk-only optimization for props
620 lines
24 KiB
Python
620 lines
24 KiB
Python
from django.test import TestCase
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from rest_framework import serializers
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from tests.models import (
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ForeignKeySource, ForeignKeySourceWithLimitedChoices,
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ForeignKeySourceWithQLimitedChoices, ForeignKeyTarget, ManyToManySource,
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ManyToManyTarget, NullableForeignKeySource, NullableOneToOneSource,
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NullableUUIDForeignKeySource, OneToOnePKSource, OneToOneTarget,
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UUIDForeignKeyTarget
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)
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# ManyToMany
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class ManyToManyTargetSerializer(serializers.ModelSerializer):
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class Meta:
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model = ManyToManyTarget
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fields = ('id', 'name', 'sources')
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class ManyToManySourceSerializer(serializers.ModelSerializer):
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class Meta:
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model = ManyToManySource
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fields = ('id', 'name', 'targets')
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# ForeignKey
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class ForeignKeyTargetSerializer(serializers.ModelSerializer):
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class Meta:
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model = ForeignKeyTarget
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fields = ('id', 'name', 'sources')
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class ForeignKeyTargetCallableSourceSerializer(serializers.ModelSerializer):
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first_source = serializers.PrimaryKeyRelatedField(
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source='get_first_source',
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read_only=True,
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)
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class Meta:
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model = ForeignKeyTarget
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fields = ('id', 'name', 'first_source')
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class ForeignKeyTargetPropertySourceSerializer(serializers.ModelSerializer):
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first_source = serializers.PrimaryKeyRelatedField(read_only=True)
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class Meta:
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model = ForeignKeyTarget
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fields = ('id', 'name', 'first_source')
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class ForeignKeySourceSerializer(serializers.ModelSerializer):
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class Meta:
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model = ForeignKeySource
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fields = ('id', 'name', 'target')
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class ForeignKeySourceWithLimitedChoicesSerializer(serializers.ModelSerializer):
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class Meta:
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model = ForeignKeySourceWithLimitedChoices
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fields = ("id", "target")
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# Nullable ForeignKey
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class NullableForeignKeySourceSerializer(serializers.ModelSerializer):
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class Meta:
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model = NullableForeignKeySource
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fields = ('id', 'name', 'target')
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# Nullable UUIDForeignKey
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class NullableUUIDForeignKeySourceSerializer(serializers.ModelSerializer):
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target = serializers.PrimaryKeyRelatedField(
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pk_field=serializers.UUIDField(),
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queryset=UUIDForeignKeyTarget.objects.all(),
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allow_null=True)
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class Meta:
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model = NullableUUIDForeignKeySource
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fields = ('id', 'name', 'target')
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# Nullable OneToOne
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class NullableOneToOneTargetSerializer(serializers.ModelSerializer):
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class Meta:
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model = OneToOneTarget
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fields = ('id', 'name', 'nullable_source')
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class OneToOnePKSourceSerializer(serializers.ModelSerializer):
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class Meta:
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model = OneToOnePKSource
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fields = '__all__'
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# TODO: Add test that .data cannot be accessed prior to .is_valid
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class PKManyToManyTests(TestCase):
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def setUp(self):
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for idx in range(1, 4):
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target = ManyToManyTarget(name='target-%d' % idx)
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target.save()
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source = ManyToManySource(name='source-%d' % idx)
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source.save()
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for target in ManyToManyTarget.objects.all():
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source.targets.add(target)
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def test_many_to_many_retrieve(self):
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queryset = ManyToManySource.objects.all()
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serializer = ManyToManySourceSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'source-1', 'targets': [1]},
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{'id': 2, 'name': 'source-2', 'targets': [1, 2]},
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{'id': 3, 'name': 'source-3', 'targets': [1, 2, 3]}
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]
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with self.assertNumQueries(4):
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assert serializer.data == expected
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def test_many_to_many_retrieve_prefetch_related(self):
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queryset = ManyToManySource.objects.all().prefetch_related('targets')
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serializer = ManyToManySourceSerializer(queryset, many=True)
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with self.assertNumQueries(2):
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serializer.data
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def test_reverse_many_to_many_retrieve(self):
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queryset = ManyToManyTarget.objects.all()
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serializer = ManyToManyTargetSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'target-1', 'sources': [1, 2, 3]},
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{'id': 2, 'name': 'target-2', 'sources': [2, 3]},
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{'id': 3, 'name': 'target-3', 'sources': [3]}
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]
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with self.assertNumQueries(4):
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assert serializer.data == expected
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def test_many_to_many_update(self):
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data = {'id': 1, 'name': 'source-1', 'targets': [1, 2, 3]}
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instance = ManyToManySource.objects.get(pk=1)
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serializer = ManyToManySourceSerializer(instance, data=data)
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assert serializer.is_valid()
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serializer.save()
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assert serializer.data == data
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# Ensure source 1 is updated, and everything else is as expected
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queryset = ManyToManySource.objects.all()
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serializer = ManyToManySourceSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'source-1', 'targets': [1, 2, 3]},
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{'id': 2, 'name': 'source-2', 'targets': [1, 2]},
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{'id': 3, 'name': 'source-3', 'targets': [1, 2, 3]}
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]
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assert serializer.data == expected
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def test_reverse_many_to_many_update(self):
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data = {'id': 1, 'name': 'target-1', 'sources': [1]}
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instance = ManyToManyTarget.objects.get(pk=1)
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serializer = ManyToManyTargetSerializer(instance, data=data)
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assert serializer.is_valid()
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serializer.save()
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assert serializer.data == data
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# Ensure target 1 is updated, and everything else is as expected
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queryset = ManyToManyTarget.objects.all()
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serializer = ManyToManyTargetSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'target-1', 'sources': [1]},
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{'id': 2, 'name': 'target-2', 'sources': [2, 3]},
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{'id': 3, 'name': 'target-3', 'sources': [3]}
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]
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assert serializer.data == expected
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def test_many_to_many_create(self):
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data = {'id': 4, 'name': 'source-4', 'targets': [1, 3]}
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serializer = ManyToManySourceSerializer(data=data)
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assert serializer.is_valid()
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obj = serializer.save()
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assert serializer.data == data
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assert obj.name == 'source-4'
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# Ensure source 4 is added, and everything else is as expected
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queryset = ManyToManySource.objects.all()
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serializer = ManyToManySourceSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'source-1', 'targets': [1]},
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{'id': 2, 'name': 'source-2', 'targets': [1, 2]},
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{'id': 3, 'name': 'source-3', 'targets': [1, 2, 3]},
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{'id': 4, 'name': 'source-4', 'targets': [1, 3]},
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]
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assert serializer.data == expected
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def test_many_to_many_unsaved(self):
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source = ManyToManySource(name='source-unsaved')
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serializer = ManyToManySourceSerializer(source)
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expected = {'id': None, 'name': 'source-unsaved', 'targets': []}
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# no query if source hasn't been created yet
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with self.assertNumQueries(0):
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assert serializer.data == expected
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def test_reverse_many_to_many_create(self):
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data = {'id': 4, 'name': 'target-4', 'sources': [1, 3]}
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serializer = ManyToManyTargetSerializer(data=data)
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assert serializer.is_valid()
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obj = serializer.save()
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assert serializer.data == data
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assert obj.name == 'target-4'
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# Ensure target 4 is added, and everything else is as expected
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queryset = ManyToManyTarget.objects.all()
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serializer = ManyToManyTargetSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'target-1', 'sources': [1, 2, 3]},
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{'id': 2, 'name': 'target-2', 'sources': [2, 3]},
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{'id': 3, 'name': 'target-3', 'sources': [3]},
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{'id': 4, 'name': 'target-4', 'sources': [1, 3]}
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]
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assert serializer.data == expected
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class PKForeignKeyTests(TestCase):
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def setUp(self):
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target = ForeignKeyTarget(name='target-1')
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target.save()
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new_target = ForeignKeyTarget(name='target-2')
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new_target.save()
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for idx in range(1, 4):
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source = ForeignKeySource(name='source-%d' % idx, target=target)
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source.save()
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def test_foreign_key_retrieve(self):
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queryset = ForeignKeySource.objects.all()
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serializer = ForeignKeySourceSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'source-1', 'target': 1},
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{'id': 2, 'name': 'source-2', 'target': 1},
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{'id': 3, 'name': 'source-3', 'target': 1}
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]
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with self.assertNumQueries(1):
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assert serializer.data == expected
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def test_reverse_foreign_key_retrieve(self):
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queryset = ForeignKeyTarget.objects.all()
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serializer = ForeignKeyTargetSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'target-1', 'sources': [1, 2, 3]},
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{'id': 2, 'name': 'target-2', 'sources': []},
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]
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with self.assertNumQueries(3):
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assert serializer.data == expected
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def test_reverse_foreign_key_retrieve_prefetch_related(self):
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queryset = ForeignKeyTarget.objects.all().prefetch_related('sources')
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serializer = ForeignKeyTargetSerializer(queryset, many=True)
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with self.assertNumQueries(2):
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serializer.data
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def test_foreign_key_update(self):
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data = {'id': 1, 'name': 'source-1', 'target': 2}
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instance = ForeignKeySource.objects.get(pk=1)
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serializer = ForeignKeySourceSerializer(instance, data=data)
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assert serializer.is_valid()
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serializer.save()
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assert serializer.data == data
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# Ensure source 1 is updated, and everything else is as expected
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queryset = ForeignKeySource.objects.all()
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serializer = ForeignKeySourceSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'source-1', 'target': 2},
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{'id': 2, 'name': 'source-2', 'target': 1},
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{'id': 3, 'name': 'source-3', 'target': 1}
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]
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assert serializer.data == expected
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def test_foreign_key_update_incorrect_type(self):
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data = {'id': 1, 'name': 'source-1', 'target': 'foo'}
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instance = ForeignKeySource.objects.get(pk=1)
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serializer = ForeignKeySourceSerializer(instance, data=data)
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assert not serializer.is_valid()
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assert serializer.errors == {'target': ['Incorrect type. Expected pk value, received str.']}
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def test_reverse_foreign_key_update(self):
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data = {'id': 2, 'name': 'target-2', 'sources': [1, 3]}
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instance = ForeignKeyTarget.objects.get(pk=2)
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serializer = ForeignKeyTargetSerializer(instance, data=data)
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assert serializer.is_valid()
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# We shouldn't have saved anything to the db yet since save
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# hasn't been called.
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queryset = ForeignKeyTarget.objects.all()
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new_serializer = ForeignKeyTargetSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'target-1', 'sources': [1, 2, 3]},
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{'id': 2, 'name': 'target-2', 'sources': []},
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]
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assert new_serializer.data == expected
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serializer.save()
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assert serializer.data == data
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# Ensure target 2 is update, and everything else is as expected
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queryset = ForeignKeyTarget.objects.all()
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serializer = ForeignKeyTargetSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'target-1', 'sources': [2]},
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{'id': 2, 'name': 'target-2', 'sources': [1, 3]},
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]
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assert serializer.data == expected
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def test_foreign_key_create(self):
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data = {'id': 4, 'name': 'source-4', 'target': 2}
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serializer = ForeignKeySourceSerializer(data=data)
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assert serializer.is_valid()
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obj = serializer.save()
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assert serializer.data == data
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assert obj.name == 'source-4'
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# Ensure source 4 is added, and everything else is as expected
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queryset = ForeignKeySource.objects.all()
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serializer = ForeignKeySourceSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'source-1', 'target': 1},
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{'id': 2, 'name': 'source-2', 'target': 1},
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{'id': 3, 'name': 'source-3', 'target': 1},
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{'id': 4, 'name': 'source-4', 'target': 2},
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]
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assert serializer.data == expected
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def test_reverse_foreign_key_create(self):
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data = {'id': 3, 'name': 'target-3', 'sources': [1, 3]}
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serializer = ForeignKeyTargetSerializer(data=data)
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assert serializer.is_valid()
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obj = serializer.save()
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assert serializer.data == data
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assert obj.name == 'target-3'
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# Ensure target 3 is added, and everything else is as expected
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queryset = ForeignKeyTarget.objects.all()
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serializer = ForeignKeyTargetSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'target-1', 'sources': [2]},
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{'id': 2, 'name': 'target-2', 'sources': []},
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{'id': 3, 'name': 'target-3', 'sources': [1, 3]},
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]
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assert serializer.data == expected
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def test_foreign_key_update_with_invalid_null(self):
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data = {'id': 1, 'name': 'source-1', 'target': None}
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instance = ForeignKeySource.objects.get(pk=1)
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serializer = ForeignKeySourceSerializer(instance, data=data)
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assert not serializer.is_valid()
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assert serializer.errors == {'target': ['This field may not be null.']}
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def test_foreign_key_with_unsaved(self):
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source = ForeignKeySource(name='source-unsaved')
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expected = {'id': None, 'name': 'source-unsaved', 'target': None}
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serializer = ForeignKeySourceSerializer(source)
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# no query if source hasn't been created yet
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with self.assertNumQueries(0):
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assert serializer.data == expected
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def test_foreign_key_with_empty(self):
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"""
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Regression test for #1072
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https://github.com/encode/django-rest-framework/issues/1072
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"""
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serializer = NullableForeignKeySourceSerializer()
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assert serializer.data['target'] is None
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def test_foreign_key_not_required(self):
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"""
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Let's say we wanted to fill the non-nullable model field inside
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Model.save(), we would make it empty and not required.
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"""
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class ModelSerializer(ForeignKeySourceSerializer):
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class Meta(ForeignKeySourceSerializer.Meta):
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extra_kwargs = {'target': {'required': False}}
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serializer = ModelSerializer(data={'name': 'test'})
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serializer.is_valid(raise_exception=True)
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assert 'target' not in serializer.validated_data
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def test_queryset_size_without_limited_choices(self):
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limited_target = ForeignKeyTarget(name="limited-target")
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limited_target.save()
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queryset = ForeignKeySourceSerializer().fields["target"].get_queryset()
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assert len(queryset) == 3
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def test_queryset_size_with_limited_choices(self):
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limited_target = ForeignKeyTarget(name="limited-target")
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limited_target.save()
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queryset = ForeignKeySourceWithLimitedChoicesSerializer().fields["target"].get_queryset()
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assert len(queryset) == 1
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def test_queryset_size_with_Q_limited_choices(self):
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limited_target = ForeignKeyTarget(name="limited-target")
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limited_target.save()
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class QLimitedChoicesSerializer(serializers.ModelSerializer):
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class Meta:
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model = ForeignKeySourceWithQLimitedChoices
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fields = ("id", "target")
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queryset = QLimitedChoicesSerializer().fields["target"].get_queryset()
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assert len(queryset) == 1
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class PKRelationTests(TestCase):
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def setUp(self):
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self.target = ForeignKeyTarget.objects.create(name='target-1')
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ForeignKeySource.objects.create(name='source-1', target=self.target)
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ForeignKeySource.objects.create(name='source-2', target=self.target)
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def test_relation_field_callable_source(self):
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serializer = ForeignKeyTargetCallableSourceSerializer(self.target)
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expected = {
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'id': 1,
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'name': 'target-1',
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'first_source': 1,
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}
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with self.assertNumQueries(1):
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self.assertEqual(serializer.data, expected)
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def test_relation_field_property_source(self):
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serializer = ForeignKeyTargetPropertySourceSerializer(self.target)
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expected = {
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'id': 1,
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'name': 'target-1',
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'first_source': 1,
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}
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with self.assertNumQueries(1):
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self.assertEqual(serializer.data, expected)
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class PKNullableForeignKeyTests(TestCase):
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def setUp(self):
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target = ForeignKeyTarget(name='target-1')
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target.save()
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for idx in range(1, 4):
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if idx == 3:
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target = None
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source = NullableForeignKeySource(name='source-%d' % idx, target=target)
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source.save()
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def test_foreign_key_retrieve_with_null(self):
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queryset = NullableForeignKeySource.objects.all()
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serializer = NullableForeignKeySourceSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'source-1', 'target': 1},
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{'id': 2, 'name': 'source-2', 'target': 1},
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{'id': 3, 'name': 'source-3', 'target': None},
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]
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assert serializer.data == expected
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def test_foreign_key_create_with_valid_null(self):
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data = {'id': 4, 'name': 'source-4', 'target': None}
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serializer = NullableForeignKeySourceSerializer(data=data)
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assert serializer.is_valid()
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obj = serializer.save()
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assert serializer.data == data
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assert obj.name == 'source-4'
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# Ensure source 4 is created, and everything else is as expected
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queryset = NullableForeignKeySource.objects.all()
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serializer = NullableForeignKeySourceSerializer(queryset, many=True)
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expected = [
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{'id': 1, 'name': 'source-1', 'target': 1},
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{'id': 2, 'name': 'source-2', 'target': 1},
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{'id': 3, 'name': 'source-3', 'target': None},
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{'id': 4, 'name': 'source-4', 'target': None}
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]
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|
assert 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)
|
|
assert serializer.is_valid()
|
|
obj = serializer.save()
|
|
assert serializer.data == expected_data
|
|
assert 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}
|
|
]
|
|
assert 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)
|
|
assert serializer.is_valid()
|
|
serializer.save()
|
|
assert serializer.data == data
|
|
|
|
# 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}
|
|
]
|
|
assert 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)
|
|
assert serializer.is_valid()
|
|
serializer.save()
|
|
assert serializer.data == expected_data
|
|
|
|
# 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}
|
|
]
|
|
assert serializer.data == expected
|
|
|
|
def test_null_uuid_foreign_key_serializes_as_none(self):
|
|
source = NullableUUIDForeignKeySource(name='Source')
|
|
serializer = NullableUUIDForeignKeySourceSerializer(source)
|
|
data = serializer.data
|
|
assert data["target"] is None
|
|
|
|
def test_nullable_uuid_foreign_key_is_valid_when_none(self):
|
|
data = {"name": "Source", "target": None}
|
|
serializer = NullableUUIDForeignKeySourceSerializer(data=data)
|
|
assert serializer.is_valid(), serializer.errors
|
|
|
|
|
|
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},
|
|
]
|
|
assert serializer.data == expected
|
|
|
|
|
|
class OneToOnePrimaryKeyTests(TestCase):
|
|
|
|
def setUp(self):
|
|
# Given: Some target models already exist
|
|
self.target = target = OneToOneTarget(name='target-1')
|
|
target.save()
|
|
self.alt_target = alt_target = OneToOneTarget(name='target-2')
|
|
alt_target.save()
|
|
|
|
def test_one_to_one_when_primary_key(self):
|
|
# When: Creating a Source pointing at the id of the second Target
|
|
target_pk = self.alt_target.id
|
|
source = OneToOnePKSourceSerializer(data={'name': 'source-2', 'target': target_pk})
|
|
# Then: The source is valid with the serializer
|
|
if not source.is_valid():
|
|
self.fail("Expected OneToOnePKTargetSerializer to be valid but had errors: {}".format(source.errors))
|
|
# Then: Saving the serializer creates a new object
|
|
new_source = source.save()
|
|
# Then: The new object has the same pk as the target object
|
|
self.assertEqual(new_source.pk, target_pk)
|
|
|
|
def test_one_to_one_when_primary_key_no_duplicates(self):
|
|
# When: Creating a Source pointing at the id of the second Target
|
|
target_pk = self.target.id
|
|
data = {'name': 'source-1', 'target': target_pk}
|
|
source = OneToOnePKSourceSerializer(data=data)
|
|
# Then: The source is valid with the serializer
|
|
self.assertTrue(source.is_valid())
|
|
# Then: Saving the serializer creates a new object
|
|
new_source = source.save()
|
|
# Then: The new object has the same pk as the target object
|
|
self.assertEqual(new_source.pk, target_pk)
|
|
# When: Trying to create a second object
|
|
second_source = OneToOnePKSourceSerializer(data=data)
|
|
self.assertFalse(second_source.is_valid())
|
|
expected = {'target': ['one to one pk source with this target already exists.']}
|
|
self.assertDictEqual(second_source.errors, expected)
|
|
|
|
def test_one_to_one_when_primary_key_does_not_exist(self):
|
|
# Given: a target PK that does not exist
|
|
target_pk = self.target.pk + self.alt_target.pk
|
|
source = OneToOnePKSourceSerializer(data={'name': 'source-2', 'target': target_pk})
|
|
# Then: The source is not valid with the serializer
|
|
self.assertFalse(source.is_valid())
|
|
self.assertIn("Invalid pk", source.errors['target'][0])
|
|
self.assertIn("object does not exist", source.errors['target'][0])
|