# ri > ActiveRecord::Core

## [ActiveRecord::Core](https://www.chedong.com/phpMan.php/perldoc/ActiveRecord%3A%3ACore/markdown)

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## Extended by:
[ActiveSupport::Concern](https://www.chedong.com/phpMan.php/perldoc/ActiveSupport%3A%3AConcern/markdown) (from /home/chedong/.local/share/rdoc)

(from /home/chedong/.local/share/rdoc)
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## Class methods:

  action_on_strict_loading_violation
  configurations
  configurations=
  connection_class
  connection_handler
  connection_handler=
  connection_handlers
  connection_handlers=
  current_preventing_writes
  current_role
  current_shard
  default_timezone
  destroy_association_async_job
  dump_schema_after_migration
  dump_schemas
  error_on_ignored_order
  logger
  new
  queues
  schema_format
  suppress_multiple_database_warning
  timestamped_migrations
  verbose_query_logs
  warn_on_records_fetched_greater_than

## Instance methods:

  <=>
  ==
  clone
  connection_handler
  dup
  encode_with
  eql?
  freeze
  frozen?
  hash
  init_with
  inspect
  pretty_print
  readonly!
  readonly?
  slice
  strict_loading!
  strict_loading?
  values_at