attr_bitwise

Bitwise attribute for ruby class and Rails model

# Helper to define a bits based value on a Rails model attribute
#   this helper expose a set of methods to make bitwise operations
#
#
# Usage :
#   attr_bitwise :<name>, [column_name: <column_name>,] mapping: <values_sym>
#
# Example
# class MyModel < ActiveRecord::Base
#   include BitwiseUtils
#
#   attr_bitwise :payment_types, mapping: [:slots, :credits]
# end
#
# Will define the following high-level methods :
#   - Class#payment_types => [<Symbol>, ...]
#   - Class#payment_type?(value_or_sym) => Boolean
#   - Class#add_payment_type(value_or_sym) => Fixnum
#   - Class#remove_payment_type(value_or_sym) => Fixnum
#
# Will define the following low-level methods :
#   - Class.to_bitwise_values(object, name) => [<Fixnum>, ...]
#   - Class#payment_types_union([Fixnum, ..]) => [Fixnum, ..]
#   - Class.bitwise_union([Fixnum, ..], name) => [Fixnum, ..]
#   - Class#payment_types_intersection([Fixnum, ..]) => [Fixnum, ..]
#   - Class.bitwise_intersection([Fixnum, ..], name) => [Fixnum, ..]
#   - Class#payment_types_mapping => Hash
#

Install

Inline

• gem install bitwise_attr

Gemfile

• gem 'bitwise_attr'

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Maintainers : @wittydeveloper and @FSevaistre