Using ActiveRecord::Store to store boolean fields

boolean_store_accessor.rb

# File: app/models/concerns/boolean_store_accessor.rb
# 
# When we submit a form in order to update a model, a booelan/checkbox field is posted
# as '1' or '0', and if we are using ActiveRecord::Store, posted value is stored in
# database as '1' or '0'.  By the help of this module, we store '1' and '0'
# values as `true` or `false`.
#
# Example usage:
#  
# ```
# class Page < ActiveRecord::Base
#   extend BooleanStoreAccessor 
#   store :settings, accessors: [:hide_from_navigation]
#   boolean_store_accessor :hide_from_navigation
# end
#
# page = Page.first
# page.hide_from_navigation? #=> false
# page.hide_from_navigation = true
# page.save
# page.hide_from_navigation? #=> true
# page.settings #=> {"hide_from_navigation"=>true}
# ```
#
module BooleanStoreAccessor

  def boolean_store_accessor(attr_name)

    define_method "#{attr_name}=".to_sym do |value|
      values = ['1', true]
      super((values.include?(value)) ? true : false)
    end

    define_method attr_name do
      values = [nil, false, '0']
      (values.include?(super())) ? false : true
    end

    define_method "#{attr_name}?".to_sym do
      send(attr_name)
    end
    
  end

end