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module Encryptable
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extend ActiveSupport::Concern
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include EncryptValue
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included do
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before_save :encrypt_setters
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end
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module ClassMethods
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def encrypts(*fields)
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class_attribute :encryptable_fields
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self.encryptable_fields = fields.map(&:to_sym)
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define_getter_in_db(fields.map(&:to_sym))
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define_auto_decrypt_getter(fields.map(&:to_sym))
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end
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def encrypts?(field)
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encryptable_fields.include?(field.to_sym)
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end
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private
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def define_getter_in_db(fields)
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fields.each do |field|
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define_method "#{field}_in_db" do
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self[field.to_sym]
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end
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end
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end
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def define_auto_decrypt_getter(fields)
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fields.each do |field|
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define_method field do
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decrypt_field(send("#{field}_in_db".to_sym))
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end
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end
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end
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end
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def encrypt_setters
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self.encryptable_fields.each do |field|
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if send("#{field}_changed?")
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self.send("#{field}=", encrypt_field(self[field.to_sym]))
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end
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end
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end
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end
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