ruby-on-rails - Trouble with the speed of using in_time_zone

Question

I am using Ruby 1.8.7 and Rails 3.0.3. Even though currently all of my users are in the same time zone as my server, I thought that in preparation for world domination I'd get rid of all of my RubyTimeObjIGotOutOfMyDb.getlocal calls and replace them with RubyTimeObjIGotOutOfMyDb.in_time_zone(user_timezone) where the user's timezone is a column in my user's table. What happened is now my page takes maybe 5 or 6 times as long to load. Is this the wrong strategy? Is there a better way I should be preparing for users in different timezones from my server?

Answer 1

看这个railscast

我想你只需要做

控制器/应用程序.rb

before_filter :set_user_time_zone

private

def set_user_time_zone
  Time.zone = current_user.time_zone if logged_in?
end

从 db 获取时，所有时间都将被转换

如果时间不在当前时区，请在视图中尝试（或在控制台中进行测试）

Time.now.in_time_zone

更新：如果您in_time_zone(zone)多次调用该调用，我认为它会多次获取相应的时差，就像截屏视频所说的那样，它只会获取一次并在每次转换中使用它。