Active Record MySQL2 Adapter

Methods

Included Modules

Constants

ADAPTER_NAME = "Mysql2"
ER_ACCESS_DENIED_ERROR = 1045
ER_BAD_DB_ERROR = 1049
ER_CONN_HOST_ERROR = 2003
ER_DBACCESS_DENIED_ERROR = 1044
ER_UNKNOWN_HOST_ERROR = 2005
TYPE_MAP = Type::TypeMap.new.tap { |m| initialize_type_map(m) }

Class Public methods

new(...)

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 66
      def initialize(...)
        super

        @config[:flags] ||= 0

        if @config[:flags].kind_of? Array
          @config[:flags].push "FOUND_ROWS"
        else
          @config[:flags] |= ::Mysql2::Client::FOUND_ROWS
        end

        @connection_parameters ||= @config
      end
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new_client(config)

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 35
        def new_client(config)
          ::Mysql2::Client.new(config)
        rescue ::Mysql2::Error => error
          case error.error_number
          when ER_BAD_DB_ERROR
            raise ActiveRecord::NoDatabaseError.db_error(config[:database])
          when ER_DBACCESS_DENIED_ERROR, ER_ACCESS_DENIED_ERROR
            raise ActiveRecord::DatabaseConnectionError.username_error(config[:username])
          when ER_CONN_HOST_ERROR, ER_UNKNOWN_HOST_ERROR
            raise ActiveRecord::DatabaseConnectionError.hostname_error(config[:host])
          else
            raise ActiveRecord::ConnectionNotEstablished, error.message
          end
        end
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Instance Public methods

active?()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 133
      def active?
        !!@raw_connection&.ping
      end
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disconnect!()

Disconnects from the database if already connected. Otherwise, this method does nothing.

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 141
      def disconnect!
        super
        @raw_connection&.close
        @raw_connection = nil
      end
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error_number(exception)

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 114
      def error_number(exception)
        exception.error_number if exception.respond_to?(:error_number)
      end
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quote_string(string)

Quotes strings for use in SQL input.

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 123
      def quote_string(string)
        with_raw_connection(allow_retry: true, materialize_transactions: false) do |connection|
          connection.escape(string)
        end
      end
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savepoint_errors_invalidate_transactions?()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 96
      def savepoint_errors_invalidate_transactions?
        true
      end
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supports_comments?()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 84
      def supports_comments?
        true
      end
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supports_comments_in_create?()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 88
      def supports_comments_in_create?
        true
      end
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supports_json?()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 80
      def supports_json?
        !mariadb? && database_version >= "5.7.8"
      end
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supports_lazy_transactions?()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 100
      def supports_lazy_transactions?
        true
      end
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supports_savepoints?()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 92
      def supports_savepoints?
        true
      end
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