Module: ActiveRecord::Timestamp
Relationships & Source Files | |
Extension / Inclusion / Inheritance Descendants | |
Included In:
| |
Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
::ActiveSupport::Concern
|
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Defined in: | activerecord/lib/active_record/timestamp.rb |
Overview
Active Record automatically timestamps create and update operations if the table has fields named created_at/created_on
or updated_at/updated_on
.
Timestamping can be turned off by setting:
config.active_record. = false
Timestamps are in UTC by default but you can use the local timezone by setting:
config.active_record.default_timezone = :local
Time Zone aware attributes
Active Record keeps all the datetime
and time
columns timezone aware. By default, these values are stored in the database as UTC and converted back to the current Time.zone when pulled from the database.
This feature can be turned off completely by setting:
config.active_record.time_zone_aware_attributes = false
You can also specify that only datetime
columns should be time-zone aware (while time
should not) by setting:
ActiveRecord::Base.time_zone_aware_types = [:datetime]
You can also add database-specific timezone aware types. For example, for PostgreSQL:
ActiveRecord::Base.time_zone_aware_types += [:tsrange, :tstzrange]
Finally, you can indicate specific attributes of a model for which time zone conversion should not applied, for instance by setting:
class Topic < ActiveRecord::Base
self.skip_time_zone_conversion_for_attributes = [:written_on]
end
Class Method Summary
::ActiveSupport::Concern
- Extended
class_methods | Define class methods from given block. |
included | Evaluate given block in context of base class, so that you can write class macros here. |
prepended | Evaluate given block in context of base class, so that you can write class macros here. |
DSL Calls
included
[ GitHub ]46 47 48
# File 'activerecord/lib/active_record/timestamp.rb', line 46
included do class_attribute :, default: true end