jam-cloud/ruby/lib/jam_ruby/models/musician_instrument.rb

module JamRuby
  class MusicianInstrument < ActiveRecord::Base

    self.table_name = "musicians_instruments"

    self.primary_key = 'id'

    # ensure most proficient, highest priority
    default_scope { order('proficiency_level DESC, priority ASC') }

    # proficiency is 1 = Beginner, 2 = Intermediate, 3 = Expert

    belongs_to :player, polymorphic: true
    belongs_to :instrument, :class_name => "JamRuby::Instrument"

    LEVEL_BEGIN = 1
    LEVEL_INTERMEDIATE = 2
    LEVEL_EXPERT = 3
    PROFICIENCY_RANGE = (LEVEL_BEGIN..LEVEL_EXPERT)

    def description
      @description = self.instrument.description
    end
  end
end