Created
August 27, 2014 15:03
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Rails bitmask_attributes attributes to bitmask conversion
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| class Sheet < ActiveRecord::Base | |
| bitmask :instruments, :as => [:guitar, :piano, :bass, :mandolin, :banjo, :ukulele, :violin, :flute, :harmonica, :trombone, :trumpet, :clarinet, :saxophone, :others], :null => false | |
| def self.instruments_to_bitmask(instruments) | |
| (instruments & Sheet.values_for_instruments).map { |r| 2**Sheet.values_for_instruments.index(r) }.inject(0, :+) | |
| end | |
| end |
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