Hstore Accessor allows you to treat fields on an hstore column as though they were actual columns being picked up by ActiveRecord. This is especially handy when trying to avoid sparse columns while making use of single table inheritence. Hstore Accessor currently supports ActiveRecord versions 4.0, 4.1, 4.2, 5.0, and 5.1. The hstore_accessor method accepts the name of the hstore column you'd like to use and a hash with keys representing fields and values indicating the type to be stored in that field. The available types are: string, integer, float, decimal, datetime, date, boolean, array, and hash. It is available on an class that inherits from ActiveRecord::Base.