问题
I'm following Ryan Bates' tutorial on adding time zones to a rails app.
http://railscasts.com/episodes/106-time-zones-revised
(It's a good tutorial, by the way)
Anyway, Ryan says it's a good idea to validate the submitted time zone with the ones that Rails knows about. He put this rule into the users' model:
validates_inclusion_of :time_zone, in: ActiveSupport::TimeZone.zones_map(&:name)
That works fine in development. However, when I run the app on Heroku, it does not like the timezone "Melbourne" (and many others - I'm mainly testing AU time zones).
On Heroku, with that rule in the user model, it will not accept a time zone of "Melbourne".
Why would that be? The time_zone_select view helper returns "Melbourne" - so rails must be aware of it.
来源：https://stackoverflow.com/questions/18325997/issue-validating-user-time-zone-for-rails-app-on-heroku