1ActiveRecord attributes stored serialized in a json column, super smooth. 2 3Typed and cast like Active Record. Supporting nested models, dirty tracking, 4some querying (with postgres jsonb contains), and working smoothy with form 5builders. 6 7Use your database as a typed object store via ActiveRecord, in the same models 8right next to ordinary ActiveRecord column-backed attributes and associations. 9Your json-serialized attr_json attributes use as much of the existing 10ActiveRecord architecture as we can. 11