mirror of
https://github.com/encode/django-rest-framework.git
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6c0c69ed65
* Revert "Non-required fields with 'allow_null=True' should not imply a default value (#5639)"
This reverts commit 905a5579df.
Closes #5708
* Add test for allow_null + required=False
Ref #5708: allow_null should imply default=None, even for non-required fields.
* Re-order allow_null and default in field docs
default is prior to allow_null. allow_null implies an outgoing default=None.
* Adjust allow_null note.
616 lines
22 KiB
Python
616 lines
22 KiB
Python
# coding: utf-8
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from __future__ import unicode_literals
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import inspect
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import pickle
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import re
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import unittest
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from collections import Mapping
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import pytest
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from django.db import models
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from rest_framework import fields, relations, serializers
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from rest_framework.compat import unicode_repr
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from rest_framework.fields import Field
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from .models import (
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ForeignKeyTarget, NestedForeignKeySource, NullableForeignKeySource
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)
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from .utils import MockObject
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try:
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from collections import ChainMap
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except ImportError:
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ChainMap = False
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# Test serializer fields imports.
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# -------------------------------
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class TestFieldImports:
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def is_field(self, name, value):
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return (
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isinstance(value, type) and
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issubclass(value, Field) and
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not name.startswith('_')
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)
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def test_fields(self):
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msg = "Expected `fields.%s` to be imported in `serializers`"
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field_classes = [
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key for key, value
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in inspect.getmembers(fields)
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if self.is_field(key, value)
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]
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# sanity check
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assert 'Field' in field_classes
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assert 'BooleanField' in field_classes
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for field in field_classes:
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assert hasattr(serializers, field), msg % field
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def test_relations(self):
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msg = "Expected `relations.%s` to be imported in `serializers`"
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field_classes = [
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key for key, value
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in inspect.getmembers(relations)
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if self.is_field(key, value)
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]
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# sanity check
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assert 'RelatedField' in field_classes
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for field in field_classes:
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assert hasattr(serializers, field), msg % field
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# Tests for core functionality.
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# -----------------------------
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class TestSerializer:
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def setup(self):
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class ExampleSerializer(serializers.Serializer):
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char = serializers.CharField()
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integer = serializers.IntegerField()
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self.Serializer = ExampleSerializer
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def test_valid_serializer(self):
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serializer = self.Serializer(data={'char': 'abc', 'integer': 123})
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assert serializer.is_valid()
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assert serializer.validated_data == {'char': 'abc', 'integer': 123}
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assert serializer.data == {'char': 'abc', 'integer': 123}
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assert serializer.errors == {}
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def test_invalid_serializer(self):
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serializer = self.Serializer(data={'char': 'abc'})
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assert not serializer.is_valid()
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assert serializer.validated_data == {}
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assert serializer.data == {'char': 'abc'}
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assert serializer.errors == {'integer': ['This field is required.']}
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def test_invalid_datatype(self):
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serializer = self.Serializer(data=[{'char': 'abc'}])
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assert not serializer.is_valid()
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assert serializer.validated_data == {}
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assert serializer.data == {}
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assert serializer.errors == {'non_field_errors': ['Invalid data. Expected a dictionary, but got list.']}
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def test_partial_validation(self):
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serializer = self.Serializer(data={'char': 'abc'}, partial=True)
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assert serializer.is_valid()
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assert serializer.validated_data == {'char': 'abc'}
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assert serializer.errors == {}
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def test_empty_serializer(self):
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serializer = self.Serializer()
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assert serializer.data == {'char': '', 'integer': None}
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def test_missing_attribute_during_serialization(self):
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class MissingAttributes:
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pass
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instance = MissingAttributes()
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serializer = self.Serializer(instance)
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with pytest.raises(AttributeError):
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serializer.data
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def test_data_access_before_save_raises_error(self):
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def create(validated_data):
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return validated_data
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serializer = self.Serializer(data={'char': 'abc', 'integer': 123})
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serializer.create = create
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assert serializer.is_valid()
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assert serializer.data == {'char': 'abc', 'integer': 123}
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with pytest.raises(AssertionError):
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serializer.save()
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def test_validate_none_data(self):
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data = None
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serializer = self.Serializer(data=data)
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assert not serializer.is_valid()
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assert serializer.errors == {'non_field_errors': ['No data provided']}
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@unittest.skipUnless(ChainMap, 'requires python 3.3')
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def test_serialize_chainmap(self):
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data = ChainMap({'char': 'abc'}, {'integer': 123})
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serializer = self.Serializer(data=data)
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assert serializer.is_valid()
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assert serializer.validated_data == {'char': 'abc', 'integer': 123}
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assert serializer.errors == {}
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def test_serialize_custom_mapping(self):
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class SinglePurposeMapping(Mapping):
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def __getitem__(self, key):
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return 'abc' if key == 'char' else 123
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def __iter__(self):
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yield 'char'
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yield 'integer'
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def __len__(self):
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return 2
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serializer = self.Serializer(data=SinglePurposeMapping())
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assert serializer.is_valid()
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assert serializer.validated_data == {'char': 'abc', 'integer': 123}
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assert serializer.errors == {}
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class TestValidateMethod:
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def test_non_field_error_validate_method(self):
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class ExampleSerializer(serializers.Serializer):
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char = serializers.CharField()
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integer = serializers.IntegerField()
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def validate(self, attrs):
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raise serializers.ValidationError('Non field error')
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serializer = ExampleSerializer(data={'char': 'abc', 'integer': 123})
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assert not serializer.is_valid()
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assert serializer.errors == {'non_field_errors': ['Non field error']}
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def test_field_error_validate_method(self):
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class ExampleSerializer(serializers.Serializer):
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char = serializers.CharField()
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integer = serializers.IntegerField()
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def validate(self, attrs):
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raise serializers.ValidationError({'char': 'Field error'})
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serializer = ExampleSerializer(data={'char': 'abc', 'integer': 123})
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assert not serializer.is_valid()
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assert serializer.errors == {'char': ['Field error']}
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class TestBaseSerializer:
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def setup(self):
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class ExampleSerializer(serializers.BaseSerializer):
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def to_representation(self, obj):
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return {
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'id': obj['id'],
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'email': obj['name'] + '@' + obj['domain']
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}
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def to_internal_value(self, data):
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name, domain = str(data['email']).split('@')
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return {
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'id': int(data['id']),
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'name': name,
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'domain': domain,
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}
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self.Serializer = ExampleSerializer
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def test_abstract_methods_raise_proper_errors(self):
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serializer = serializers.BaseSerializer()
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with pytest.raises(NotImplementedError):
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serializer.to_internal_value(None)
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with pytest.raises(NotImplementedError):
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serializer.to_representation(None)
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with pytest.raises(NotImplementedError):
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serializer.update(None, None)
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with pytest.raises(NotImplementedError):
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serializer.create(None)
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def test_access_to_data_attribute_before_validation_raises_error(self):
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serializer = serializers.BaseSerializer(data={'foo': 'bar'})
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with pytest.raises(AssertionError):
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serializer.data
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def test_access_to_errors_attribute_before_validation_raises_error(self):
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serializer = serializers.BaseSerializer(data={'foo': 'bar'})
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with pytest.raises(AssertionError):
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serializer.errors
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def test_access_to_validated_data_attribute_before_validation_raises_error(self):
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serializer = serializers.BaseSerializer(data={'foo': 'bar'})
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with pytest.raises(AssertionError):
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serializer.validated_data
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def test_serialize_instance(self):
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instance = {'id': 1, 'name': 'tom', 'domain': 'example.com'}
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serializer = self.Serializer(instance)
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assert serializer.data == {'id': 1, 'email': 'tom@example.com'}
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def test_serialize_list(self):
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instances = [
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{'id': 1, 'name': 'tom', 'domain': 'example.com'},
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{'id': 2, 'name': 'ann', 'domain': 'example.com'},
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]
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serializer = self.Serializer(instances, many=True)
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assert serializer.data == [
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{'id': 1, 'email': 'tom@example.com'},
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{'id': 2, 'email': 'ann@example.com'}
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]
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def test_validate_data(self):
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data = {'id': 1, 'email': 'tom@example.com'}
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serializer = self.Serializer(data=data)
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assert serializer.is_valid()
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assert serializer.validated_data == {
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'id': 1,
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'name': 'tom',
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'domain': 'example.com'
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}
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def test_validate_list(self):
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data = [
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{'id': 1, 'email': 'tom@example.com'},
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{'id': 2, 'email': 'ann@example.com'},
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]
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serializer = self.Serializer(data=data, many=True)
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assert serializer.is_valid()
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assert serializer.validated_data == [
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{'id': 1, 'name': 'tom', 'domain': 'example.com'},
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{'id': 2, 'name': 'ann', 'domain': 'example.com'}
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]
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class TestStarredSource:
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"""
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Tests for `source='*'` argument, which is used for nested representations.
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For example:
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nested_field = NestedField(source='*')
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"""
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data = {
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'nested1': {'a': 1, 'b': 2},
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'nested2': {'c': 3, 'd': 4}
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}
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def setup(self):
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class NestedSerializer1(serializers.Serializer):
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a = serializers.IntegerField()
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b = serializers.IntegerField()
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class NestedSerializer2(serializers.Serializer):
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c = serializers.IntegerField()
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d = serializers.IntegerField()
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class TestSerializer(serializers.Serializer):
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nested1 = NestedSerializer1(source='*')
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nested2 = NestedSerializer2(source='*')
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self.Serializer = TestSerializer
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def test_nested_validate(self):
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"""
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A nested representation is validated into a flat internal object.
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"""
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serializer = self.Serializer(data=self.data)
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assert serializer.is_valid()
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assert serializer.validated_data == {
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'a': 1,
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'b': 2,
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'c': 3,
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'd': 4
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}
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def test_nested_serialize(self):
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"""
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An object can be serialized into a nested representation.
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"""
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instance = {'a': 1, 'b': 2, 'c': 3, 'd': 4}
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serializer = self.Serializer(instance)
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assert serializer.data == self.data
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class TestIncorrectlyConfigured:
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def test_incorrect_field_name(self):
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class ExampleSerializer(serializers.Serializer):
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incorrect_name = serializers.IntegerField()
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class ExampleObject:
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def __init__(self):
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self.correct_name = 123
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instance = ExampleObject()
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serializer = ExampleSerializer(instance)
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with pytest.raises(AttributeError) as exc_info:
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serializer.data
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msg = str(exc_info.value)
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assert msg.startswith(
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"Got AttributeError when attempting to get a value for field `incorrect_name` on serializer `ExampleSerializer`.\n"
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"The serializer field might be named incorrectly and not match any attribute or key on the `ExampleObject` instance.\n"
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"Original exception text was:"
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)
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class TestUnicodeRepr:
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def test_unicode_repr(self):
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class ExampleSerializer(serializers.Serializer):
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example = serializers.CharField()
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class ExampleObject:
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def __init__(self):
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self.example = '한국'
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def __repr__(self):
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return unicode_repr(self.example)
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instance = ExampleObject()
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serializer = ExampleSerializer(instance)
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repr(serializer) # Should not error.
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class TestNotRequiredOutput:
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def test_not_required_output_for_dict(self):
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"""
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'required=False' should allow a dictionary key to be missing in output.
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"""
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class ExampleSerializer(serializers.Serializer):
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omitted = serializers.CharField(required=False)
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included = serializers.CharField()
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serializer = ExampleSerializer(data={'included': 'abc'})
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serializer.is_valid()
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assert serializer.data == {'included': 'abc'}
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def test_not_required_output_for_object(self):
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"""
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'required=False' should allow an object attribute to be missing in output.
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"""
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class ExampleSerializer(serializers.Serializer):
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omitted = serializers.CharField(required=False)
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included = serializers.CharField()
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def create(self, validated_data):
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return MockObject(**validated_data)
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serializer = ExampleSerializer(data={'included': 'abc'})
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serializer.is_valid()
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serializer.save()
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assert serializer.data == {'included': 'abc'}
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class TestDefaultOutput:
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def setup(self):
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class ExampleSerializer(serializers.Serializer):
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has_default = serializers.CharField(default='x')
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has_default_callable = serializers.CharField(default=lambda: 'y')
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no_default = serializers.CharField()
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self.Serializer = ExampleSerializer
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def test_default_used_for_dict(self):
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"""
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'default="something"' should be used if dictionary key is missing from input.
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"""
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serializer = self.Serializer({'no_default': 'abc'})
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assert serializer.data == {'has_default': 'x', 'has_default_callable': 'y', 'no_default': 'abc'}
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def test_default_used_for_object(self):
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"""
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'default="something"' should be used if object attribute is missing from input.
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"""
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instance = MockObject(no_default='abc')
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serializer = self.Serializer(instance)
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assert serializer.data == {'has_default': 'x', 'has_default_callable': 'y', 'no_default': 'abc'}
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def test_default_not_used_when_in_dict(self):
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"""
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'default="something"' should not be used if dictionary key is present in input.
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"""
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serializer = self.Serializer({'has_default': 'def', 'has_default_callable': 'ghi', 'no_default': 'abc'})
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assert serializer.data == {'has_default': 'def', 'has_default_callable': 'ghi', 'no_default': 'abc'}
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def test_default_not_used_when_in_object(self):
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"""
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'default="something"' should not be used if object attribute is present in input.
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"""
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instance = MockObject(has_default='def', has_default_callable='ghi', no_default='abc')
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serializer = self.Serializer(instance)
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assert serializer.data == {'has_default': 'def', 'has_default_callable': 'ghi', 'no_default': 'abc'}
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def test_default_for_dotted_source(self):
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"""
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'default="something"' should be used when a traversed attribute is missing from input.
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"""
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class Serializer(serializers.Serializer):
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traversed = serializers.CharField(default='x', source='traversed.attr')
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assert Serializer({}).data == {'traversed': 'x'}
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assert Serializer({'traversed': {}}).data == {'traversed': 'x'}
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assert Serializer({'traversed': None}).data == {'traversed': 'x'}
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assert Serializer({'traversed': {'attr': 'abc'}}).data == {'traversed': 'abc'}
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def test_default_for_multiple_dotted_source(self):
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class Serializer(serializers.Serializer):
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c = serializers.CharField(default='x', source='a.b.c')
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assert Serializer({}).data == {'c': 'x'}
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assert Serializer({'a': {}}).data == {'c': 'x'}
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assert Serializer({'a': None}).data == {'c': 'x'}
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assert Serializer({'a': {'b': {}}}).data == {'c': 'x'}
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assert Serializer({'a': {'b': None}}).data == {'c': 'x'}
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assert Serializer({'a': {'b': {'c': 'abc'}}}).data == {'c': 'abc'}
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# Same test using model objects to exercise both paths in
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# rest_framework.fields.get_attribute() (#5880)
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class ModelSerializer(serializers.Serializer):
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target = serializers.CharField(default='x', source='target.target.name')
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a = NestedForeignKeySource(name="Root Object", target=None)
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assert ModelSerializer(a).data == {'target': 'x'}
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b = NullableForeignKeySource(name="Intermediary Object", target=None)
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a.target = b
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assert ModelSerializer(a).data == {'target': 'x'}
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c = ForeignKeyTarget(name="Target Object")
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b.target = c
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assert ModelSerializer(a).data == {'target': 'Target Object'}
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def test_default_for_nested_serializer(self):
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class NestedSerializer(serializers.Serializer):
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a = serializers.CharField(default='1')
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c = serializers.CharField(default='2', source='b.c')
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class Serializer(serializers.Serializer):
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nested = NestedSerializer()
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assert Serializer({'nested': None}).data == {'nested': None}
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assert Serializer({'nested': {}}).data == {'nested': {'a': '1', 'c': '2'}}
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assert Serializer({'nested': {'a': '3', 'b': {}}}).data == {'nested': {'a': '3', 'c': '2'}}
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assert Serializer({'nested': {'a': '3', 'b': {'c': '4'}}}).data == {'nested': {'a': '3', 'c': '4'}}
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def test_default_for_allow_null(self):
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"""
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Without an explicit default, allow_null implies default=None when serializing. #5518 #5708
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"""
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class Serializer(serializers.Serializer):
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foo = serializers.CharField()
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bar = serializers.CharField(source='foo.bar', allow_null=True)
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optional = serializers.CharField(required=False, allow_null=True)
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# allow_null=True should imply default=None when serialising:
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assert Serializer({'foo': None}).data == {'foo': None, 'bar': None, 'optional': None, }
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class TestCacheSerializerData:
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def test_cache_serializer_data(self):
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"""
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Caching serializer data with pickle will drop the serializer info,
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but does preserve the data itself.
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"""
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class ExampleSerializer(serializers.Serializer):
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field1 = serializers.CharField()
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field2 = serializers.CharField()
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|
|
|
serializer = ExampleSerializer({'field1': 'a', 'field2': 'b'})
|
|
pickled = pickle.dumps(serializer.data)
|
|
data = pickle.loads(pickled)
|
|
assert data == {'field1': 'a', 'field2': 'b'}
|
|
|
|
|
|
class TestDefaultInclusions:
|
|
def setup(self):
|
|
class ExampleSerializer(serializers.Serializer):
|
|
char = serializers.CharField(default='abc')
|
|
integer = serializers.IntegerField()
|
|
self.Serializer = ExampleSerializer
|
|
|
|
def test_default_should_included_on_create(self):
|
|
serializer = self.Serializer(data={'integer': 456})
|
|
assert serializer.is_valid()
|
|
assert serializer.validated_data == {'char': 'abc', 'integer': 456}
|
|
assert serializer.errors == {}
|
|
|
|
def test_default_should_be_included_on_update(self):
|
|
instance = MockObject(char='def', integer=123)
|
|
serializer = self.Serializer(instance, data={'integer': 456})
|
|
assert serializer.is_valid()
|
|
assert serializer.validated_data == {'char': 'abc', 'integer': 456}
|
|
assert serializer.errors == {}
|
|
|
|
def test_default_should_not_be_included_on_partial_update(self):
|
|
instance = MockObject(char='def', integer=123)
|
|
serializer = self.Serializer(instance, data={'integer': 456}, partial=True)
|
|
assert serializer.is_valid()
|
|
assert serializer.validated_data == {'integer': 456}
|
|
assert serializer.errors == {}
|
|
|
|
|
|
class TestSerializerValidationWithCompiledRegexField:
|
|
def setup(self):
|
|
class ExampleSerializer(serializers.Serializer):
|
|
name = serializers.RegexField(re.compile(r'\d'), required=True)
|
|
self.Serializer = ExampleSerializer
|
|
|
|
def test_validation_success(self):
|
|
serializer = self.Serializer(data={'name': '2'})
|
|
assert serializer.is_valid()
|
|
assert serializer.validated_data == {'name': '2'}
|
|
assert serializer.errors == {}
|
|
|
|
|
|
class Test2555Regression:
|
|
def test_serializer_context(self):
|
|
class NestedSerializer(serializers.Serializer):
|
|
def __init__(self, *args, **kwargs):
|
|
super(NestedSerializer, self).__init__(*args, **kwargs)
|
|
# .context should not cache
|
|
self.context
|
|
|
|
class ParentSerializer(serializers.Serializer):
|
|
nested = NestedSerializer()
|
|
|
|
serializer = ParentSerializer(data={}, context={'foo': 'bar'})
|
|
assert serializer.context == {'foo': 'bar'}
|
|
assert serializer.fields['nested'].context == {'foo': 'bar'}
|
|
|
|
|
|
class Test4606Regression:
|
|
def setup(self):
|
|
class ExampleSerializer(serializers.Serializer):
|
|
name = serializers.CharField(required=True)
|
|
choices = serializers.CharField(required=True)
|
|
self.Serializer = ExampleSerializer
|
|
|
|
def test_4606_regression(self):
|
|
serializer = self.Serializer(data=[{"name": "liz"}], many=True)
|
|
with pytest.raises(serializers.ValidationError):
|
|
serializer.is_valid(raise_exception=True)
|
|
|
|
|
|
class TestDeclaredFieldInheritance:
|
|
def test_declared_field_disabling(self):
|
|
class Parent(serializers.Serializer):
|
|
f1 = serializers.CharField()
|
|
f2 = serializers.CharField()
|
|
|
|
class Child(Parent):
|
|
f1 = None
|
|
|
|
class Grandchild(Child):
|
|
pass
|
|
|
|
assert len(Parent._declared_fields) == 2
|
|
assert len(Child._declared_fields) == 1
|
|
assert len(Grandchild._declared_fields) == 1
|
|
|
|
def test_meta_field_disabling(self):
|
|
# Declaratively setting a field on a child class will *not* prevent
|
|
# the ModelSerializer from generating a default field.
|
|
class MyModel(models.Model):
|
|
f1 = models.CharField(max_length=10)
|
|
f2 = models.CharField(max_length=10)
|
|
|
|
class Parent(serializers.ModelSerializer):
|
|
class Meta:
|
|
model = MyModel
|
|
fields = ['f1', 'f2']
|
|
|
|
class Child(Parent):
|
|
f1 = None
|
|
|
|
class Grandchild(Child):
|
|
pass
|
|
|
|
assert len(Parent().get_fields()) == 2
|
|
assert len(Child().get_fields()) == 2
|
|
assert len(Grandchild().get_fields()) == 2
|