Open aditya-bhawsingka opened 3 years ago
I have the same problem this change was introduced https://github.com/marshmallow-code/marshmallow/commit/bff0ba2560b2812eeebed5d564e855a98809e66a Or here https://github.com/marshmallow-code/marshmallow/blob/dev/CHANGELOG.rst#300rc8-2019-07-04
Having a list field on schema is giving an error after upgrading to the latest version. The get_nested_fields function is trying to access an attribute 'container' on a list field, which as per latest marshmallow version does not exist. So replacing it with a new field called 'inner'.