rails-api/active_model_serializers — pull request #751 by jejacks0n (2014-12-08 23:07:38+00:00)
Title: Fixes an issue with associations not passing options to ArraySerializer.

- this simply allows ArraySerializer to determine what serializer to use if the option is passed.

I was unable to get a `has_many` association to render with a specific serializer, and was getting an undefined new for Nil exception because I don't have a top level PostSerializer defined.