From 1b742ea9b100278dd818879a4162dab1a2c0e6d4 Mon Sep 17 00:00:00 2001
From: Santiago Pastorino <santiago@wyeworks.com>
Date: Fri, 2 Apr 2010 16:44:38 -0300
Subject: delegate unknown timezones to TZInfo

---
 activesupport/lib/active_support/values/time_zone.rb | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

(limited to 'activesupport/lib/active_support/values')

diff --git a/activesupport/lib/active_support/values/time_zone.rb b/activesupport/lib/active_support/values/time_zone.rb
index b9766a236a..03b324764b 100644
--- a/activesupport/lib/active_support/values/time_zone.rb
+++ b/activesupport/lib/active_support/values/time_zone.rb
@@ -310,13 +310,15 @@ module ActiveSupport
     end
 
     def tzinfo
-      @tzinfo ||= find_tzinfo
+      @tzinfo ||= TimeZone.find_tzinfo(name)
     end
 
     # TODO: Preload instead of lazy load for thread safety
-    def find_tzinfo
+    def self.find_tzinfo(name)
       require 'tzinfo' unless defined?(::TZInfo)
-      ::TZInfo::Timezone.get(MAPPING[name])
+      ::TZInfo::Timezone.get(MAPPING[name] || name)
+    rescue TZInfo::InvalidTimezoneIdentifier
+      nil
     end
 
     unless const_defined?(:ZONES)
@@ -330,7 +332,6 @@ module ActiveSupport
       end
       ZONES.sort!
       ZONES.freeze
-      ZONES_MAP.freeze
 
       US_ZONES = ZONES.find_all { |z| z.name =~ /US|Arizona|Indiana|Hawaii|Alaska/ }
       US_ZONES.freeze
@@ -361,7 +362,7 @@ module ActiveSupport
       def [](arg)
         case arg
           when String
-            ZONES_MAP[arg]
+            ZONES_MAP[arg] ||= lookup(arg)
           when Numeric, ActiveSupport::Duration
             arg *= 3600 if arg.abs <= 13
             all.find { |z| z.utc_offset == arg.to_i }
@@ -375,6 +376,12 @@ module ActiveSupport
       def us_zones
         US_ZONES
       end
+
+      private
+
+        def lookup(name)
+          (tzinfo = find_tzinfo(name)) && create(tzinfo.name.freeze)
+        end
     end
   end
 end
-- 
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