flippercloud/flipper · error · RuntimeError

#{data_type} is not supported by this adapter

Error message

#{data_type} is not supported by this adapter

What it means

Error "#{data_type} is not supported by this adapter" thrown in flippercloud/flipper.

Source

Thrown at lib/flipper/adapters/active_record.rb:194

          set(feature, gate, thing)
        when :json
          with_write_connection(@gate_class) do
            delete(feature, gate)
          end
        when :set
          with_write_connection(@gate_class) do
            @gate_class.where(feature_key: feature.key, key: gate.key, value: thing.value).destroy_all
          end
        else
          unsupported_data_type gate.data_type
        end

        true
      end

      # Private
      def unsupported_data_type(data_type)
        raise "#{data_type} is not supported by this adapter"
      end

      private

      def model_class(default_class, table_prefix, table_name)
        return default_class if table_prefix.nil?

        Class.new(default_class) do
          self.table_name = "#{table_prefix}#{table_name}"
        end
      end

      def set(feature, gate, thing, options = {})
        clear_feature = options.fetch(:clear, false)
        json_feature = options.fetch(:json, false)

        raise VALUE_TO_TEXT_WARNING if json_feature && value_not_text?

View on GitHub (pinned to 1f86de3ec9)

Solutions

1. Do not use ActiveRecord adapter features for that data type; it only supports the documented gate data types
2. Migrate the offending data to a supported type (string, integer, boolean, json as documented)
3. Upgrade flipper-active_record if a newer version added support for that data type

When it happens

Trigger: Thrown at lib/flipper/adapters/active_record.rb:194 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of flippercloud/flipper@1f86de3ec9 (2026-08-23). Data as JSON: /api/errors/8bb6479b466c8397. Report an issue: GitHub.