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use writablefield style for serializer handling of self.default
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@ -358,11 +358,13 @@ class BaseSerializer(WritableField):
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try:
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try:
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value = data[field_name]
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value = data[field_name]
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except KeyError:
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except KeyError:
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if self.required:
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if self.default is not None and not self.partial:
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raise ValidationError(self.error_messages['required'])
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# Note: partial updates shouldn't set defaults
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if self.default is None:
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value = copy.deepcopy(self.default)
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else:
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if self.required:
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raise ValidationError(self.error_messages['required'])
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return
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return
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value = copy.deepcopy(self.default)
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# Set the serializer object if it exists
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# Set the serializer object if it exists
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obj = getattr(self.parent.object, field_name) if self.parent.object else None
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obj = getattr(self.parent.object, field_name) if self.parent.object else None
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