class ActiveRecord::ConnectionAdapters::SQLiteColumn

def string_to_binary(value)
  value = value.dup.force_encoding(Encoding::BINARY) if value.respond_to?(:force_encoding)
  value.gsub(/\0|\%/n) do |b|
    case b
      when "\0" then "%00"
      when "%"  then "%25"
    end
  end
end