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mrnugget/gist:1438953

Created December 6, 2011 17:00
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gistfile1.rb
class Song < ActiveRecord::Base
belongs_to :session
validates :file_name, :presence => true
validate :file_name_has_to_be_audio
def file_name_has_to_be_audio
unless ['mp3', 'MP3', 'flac', 'FLAC', 'wav', 'WAV'].include? file_name.split(".").last
errors.add(:file_name, "has to be mp3/flac/wav file")
end
end
end
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