validate

# File activerecord/lib/active_record/fixture_set/file.rb, line 76
        def validate(data)
          unless Hash === data || YAML::Omap === data
            raise Fixture::FormatError, "fixture is not a hash: #{@file}"
          end

          invalid = data.reject { |_, row| Hash === row }
          if invalid.any?
            raise Fixture::FormatError, "fixture key is not a hash: #{@file}, keys: #{invalid.keys.inspect}"
          end
          data
        end