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Fields with 'allow_null=True' should imply a default serialization value (#5518)
* Add test for dotted source + allow_null * Field 'allow_null' implies 'default=None' * Field 'allow_null' provides serialization default
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@ -442,6 +442,8 @@ class Field(object):
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except (KeyError, AttributeError) as exc:
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if self.default is not empty:
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return self.get_default()
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if self.allow_null:
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return None
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if not self.required:
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raise SkipField()
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msg = (
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@ -449,6 +449,14 @@ class TestDefaultOutput:
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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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# allow_null=True should imply default=None
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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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assert Serializer({'foo': None}).data == {'foo': None, 'bar': None}
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class TestCacheSerializerData:
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def test_cache_serializer_data(self):
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