module ActiveRecord::Timestamp
Active Record Timestamp¶ ↑
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.record_timestamps = false
Timestamps are in the local timezone by default but you can use UTC by setting:
config.active_record.default_timezone = :utc
Time Zone aware attributes¶ ↑
By default, ActiveRecord::Base keeps all the datetime columns time zone aware by executing following code.
config.active_record.time_zone_aware_attributes = true
This feature can easily be turned off by assigning value false
.
If your attributes are time zone aware and you desire to skip time zone conversion to the current Time.zone when reading certain attributes then you can do following:
class Topic < ActiveRecord::Base self.skip_time_zone_conversion_for_attributes = [:written_on] end
Public Instance Methods
initialize_dup(other)
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Calls superclass method
# File lib/active_record/timestamp.rb, line 40 def initialize_dup(other) clear_timestamp_attributes super end
Private Instance Methods
all_timestamp_attributes_in_model()
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# File lib/active_record/timestamp.rb, line 86 def all_timestamp_attributes_in_model timestamp_attributes_for_create_in_model + timestamp_attributes_for_update_in_model end
clear_timestamp_attributes()
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Clear attributes and changed_attributes
# File lib/active_record/timestamp.rb, line 107 def clear_timestamp_attributes all_timestamp_attributes_in_model.each do |attribute_name| self[attribute_name] = nil changed_attributes.delete(attribute_name) end end
should_record_timestamps?()
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# File lib/active_record/timestamp.rb, line 74 def should_record_timestamps? self.record_timestamps && (!partial_updates? || changed? || (attributes.keys & self.class.serialized_attributes.keys).present?) end
timestamp_attributes_for_create_in_model()
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# File lib/active_record/timestamp.rb, line 78 def timestamp_attributes_for_create_in_model timestamp_attributes_for_create.select { |c| self.class.column_names.include?(c.to_s) } end
timestamp_attributes_for_update_in_model()
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# File lib/active_record/timestamp.rb, line 82 def timestamp_attributes_for_update_in_model timestamp_attributes_for_update.select { |c| self.class.column_names.include?(c.to_s) } end