Serializers with many=True should return empty list rather than empty dict

[nip3o]

A serializer with many=True returns a list of dicts when accessing serializer.errors or serializer.validated_data. If these are empty, however, an empty dict is returned (just as when many=False). I believe that it would be more consistent to return an empty list in this case.

Example test case: https://github.com/tomchristie/django-rest-framework/compare/tomchristie:master...nip3o:empty-errors?expand=1

==================================================================================== FAILURES ====================================================================================
_______________________________________________________________ BulkCreateSerializerTests.test_bulk_create_errors ________________________________________________________________
tests/test_serializer_bulk_update.py:80: in test_bulk_create_errors
    self.assertEqual(serializer.validated_data, [])
E   AssertionError: {} != []
_______________________________________________________________ BulkCreateSerializerTests.test_bulk_create_success _______________________________________________________________
tests/test_serializer_bulk_update.py:49: in test_bulk_create_success
    self.assertEqual(serializer.errors, [])
E   AssertionError: {} != []
================================================================ 2 failed, 743 passed, 2 warnings in 7.98 seconds ===============================================================

[tomchristie]

Any chance you could submit those as a pull request? That'd help move things along further than linking to a diff.

[nip3o]

Done!

[tomchristie]

👍

[awwester]

@jpadilla should this be closed or is there something remaining?