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# The thread_local_timezones extension allows you to set a per-thread timezone that
# will override the default global timezone while the thread is executing. The
# main use case is for web applications that execute each request in its own thread,
# and want to set the timezones based on the request. The most common example
# is having the database always store time in UTC, but have the application deal
# with the timezone of the current user. That can be done with:
#
# Sequel.database_timezone = :utc
# # In each thread:
# Sequel.thread_application_timezone = current_user.timezone
#
# This extension is designed to work with the named_timezones extension.
#
# This extension adds the thread_application_timezone=, thread_database_timezone=,
# and thread_typecast_timezone= methods to the Sequel module. It overrides
# the application_timezone, database_timezone, and typecast_timezone
# methods to check the related thread local timezone first, and use it if present.
# If the related thread local timezone is not present, it falls back to the
# default global timezone.
#
# There is one special case of note. If you have a default global timezone
# and you want to have a nil thread local timezone, you have to set the thread
# local value to :nil instead of nil:
#
# Sequel.application_timezone = :utc
# Sequel.thread_application_timezone = nil
# Sequel.application_timezone # => :utc
# Sequel.thread_application_timezone = :nil
# Sequel.application_timezone # => nil
module Sequel
module ThreadLocalTimezones
%w'application database typecast'.each do |t|
class_eval("def thread_#{t}_timezone=(tz); Thread.current[:#{t}_timezone] = convert_timezone_setter_arg(tz); end", __FILE__, __LINE__)
class_eval(<<END, __FILE__, __LINE__ + 1)
def #{t}_timezone
if tz = Thread.current[:#{t}_timezone]
tz unless tz == :nil
else
super
end
end
END
end
end
extend ThreadLocalTimezones
end
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10 entries across 10 versions & 1 rubygems