class ActiveRecord::ConnectionAdapters::Mysql2Adapter

Родительский класс:: ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter
Подключенные модули:: ActiveRecord::ConnectionAdapters::Mysql2::DatabaseStatements

Адаптер Active Record для MySQL2

Константы

ADAPTER_NAME
ER_ACCESS_DENIED_ERROR
ER_BAD_DB_ERROR
ER_CONN_HOST_ERROR
ER_DBACCESS_DENIED_ERROR
ER_UNKNOWN_HOST_ERROR
ER_UNKNOWN_STMT_HANDLER
TYPE_MAP

Открытые методы класса

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 56
def initialize(...)
  super

  @affected_rows_before_warnings = nil
  @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

Вызывает метод родительского класса ActiveRecord::ConnectionAdapters::QueryCache::new

new_client (config) Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 25
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

Открытые методы экземпляра

active? () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 107
def active?
  if connected?
    @lock.synchronize do
      if @raw_connection&.ping
        verified!
        true
      end
    end
  end || false
end

connected? () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 103
def connected?
  !(@raw_connection.nil? || @raw_connection.closed?)
end

disconnect! () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 122
def disconnect!
  @lock.synchronize do
    super
    @raw_connection&.close
    @raw_connection = nil
  end
end

Разрывает соединение с базой данных, если оно установлено. В противном случае этот метод ничего не делает.

Вызывает метод родительского класса ActiveRecord::ConnectionAdapters::AbstractAdapter#disconnect!

error_number (exception) Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 95
def error_number(exception)
  exception.error_number if exception.respond_to?(:error_number)
end

savepoint_errors_invalidate_transactions? () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 87
def savepoint_errors_invalidate_transactions?
  true
end

supports_comments? () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 75
def supports_comments?
  true
end

supports_comments_in_create? () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 79
def supports_comments_in_create?
  true
end

supports_json? () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 71
def supports_json?
  !mariadb? && database_version >= "5.7.8"
end

supports_lazy_transactions? () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 91
def supports_lazy_transactions?
  true
end

supports_savepoints? () Показать исходный код

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 83
def supports_savepoints?
  true
end