def encodeWithCoder(coder)
      columns.each do |attr|
        # Serialize attributes except the proxy has_many and belongs_to ones.
        unless [:belongs_to, :has_many, :has_one].include? column(attr).type
          value = self.send(attr)
          unless value.nil?
            coder.encodeObject(value, forKey: attr.to_s)
          end
        end
      end
    end
def encodeWithCoder(coder)
      columns.each do |attr|
        
        unless [:belongs_to, :has_many, :has_one].include? column(attr).type
          value = self.send(attr)
          unless value.nil?
            coder.encodeObject(value, forKey: attr.to_s)
          end
        end
      end
    end
def encodeWithCoder ( coder ) columns . each do | attr | # Serialize attributes except the proxy has_many and belongs_to ones. unless [ :belongs_to , :has_many , :has_one ] . include? column ( attr ) . type value = self . send ( attr ) unless value . nil? coder . encodeObject ( value , forKey : attr . to_s ) end end end end
Follow Apple's recommendation not to encode missing
 values.
Follow Apple s recommendation not to encode missing values .