Bit fields for ActiveRecord: This gem lets you use a single integer column in an ActiveRecord model to store a collection of boolean attributes (flags). Each flag can be used almost in the same way you would use any boolean attribute on an ActiveRecord object.

Save migrations and columns by storing multiple booleans in a single integer

Simple bitmask attribute support for ActiveRecord

Provides an easy way to work with bit fields in active record

Bit array for ActiveRecord

Enummer implements multi-value enums with bitwise operations.

Bitfield value object for ActiveModel. No hidden definitions. No callbacks. Magicless.