instance method translate_exception

# File activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb, line 494
        def translate_exception(exception, message)
          case exception.message
          # SQLite 3.8.2 returns a newly formatted error message:
          #   UNIQUE constraint failed: *table_name*.*column_name*
          # Older versions of SQLite return:
          #   column *column_name* is not unique
          when /column(s)? .* (is|are) not unique/, /UNIQUE constraint failed: .*/
            RecordNotUnique.new(message)
          when /.* may not be NULL/, /NOT NULL constraint failed: .*/
            NotNullViolation.new(message)
          when /FOREIGN KEY constraint failed/i
            InvalidForeignKey.new(message)
          else
            super
          end
        end