/usr/lib/ruby/vendor_ruby/sequel/extensions/current_datetime_timestamp.rb is in ruby-sequel 4.15.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | # The current_datetime_timestamp extension makes Dataset#current_datetime
# return an object that operates like Sequel.datetime_class.now, but will
# be literalized as CURRENT_TIMESTAMP.
#
# This allows you to use the defaults_setter, timestamps, and touch
# model plugins and make sure that CURRENT_TIMESTAMP is used instead of
# a literalized timestamp value.
#
# The reason that CURRENT_TIMESTAMP is better than a literalized version
# of the timestamp is that it obeys correct transactional semantics
# (all calls to CURRENT_TIMESTAMP in the same transaction return the
# same timestamp, at least on some databases).
#
# To have current_datetime be literalized as CURRENT_TIMESTAMP for
# a single dataset:
#
# ds = ds.extension(:current_datetime_timestamp)
#
# To have current_datetime be literalized as CURRENT_TIMESTAMP for all
# datasets of a given database.
#
# DB.extension(:current_datetime_timestamp)
#
module Sequel
module CurrentDateTimeTimestamp
module DatasetMethods
# Return an instance of Sequel.datetime_class that will be literalized
# as CURRENT_TIMESTAMP.
def current_datetime
MAP.fetch(Sequel.datetime_class).now
end
private
# Literalize custom DateTime subclass objects as CURRENT_TIMESTAMP.
def literal_datetime_append(sql, v)
v.is_a?(DateTime) ? literal_append(sql, Sequel::CURRENT_TIMESTAMP) : super
end
# Literalize custom Time subclass objects as CURRENT_TIMESTAMP.
def literal_time_append(sql, v)
v.is_a?(Time) ? literal_append(sql, Sequel::CURRENT_TIMESTAMP) : super
end
end
# Time subclass literalized as CURRENT_TIMESTAMP
class Time < ::Time; end
# DateTime subclass literalized as CURRENT_TIMESTAMP
class DateTime < ::DateTime; end
# Mapping of Time/DateTime classes to subclasses literalized as CURRENT_TIMESTAMP
MAP = {::Time=>Time, ::DateTime=>DateTime}
end
Dataset.register_extension(:current_datetime_timestamp, CurrentDateTimeTimestamp::DatasetMethods)
end
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