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docs/api-guide/fields.md
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@ -83,7 +83,7 @@ The name of the attribute that will be used to populate the field. May be a met
When serializing fields with dotted notation, it may be necessary to provide a `default` value if any object is not present or is empty during attribute traversal. Beware of possible n+1 problems when using source attribute if you are accessing a relational orm model. For example:
class CommentSerializer(serializers.Serializer):
email = serializers.EmailField(source='user.email')
email = serializers.EmailField(source="user.email")
would require user object to be fetched from database when it is not prefetched. If that is not wanted, be sure to be using `prefetch_related` and `select_related` methods appropriately. For more information about the methods refer to [django documentation][django-docs-select-related].