lib/greenwich/rails.rb in greenwich-0.0.2 vs lib/greenwich/rails.rb in greenwich-0.0.3

@@ -50,10 +50,11 @@
       def time_zone(name, options = {})
         options[:for] = [options[:for]].compact unless options[:for].is_a? Array
         options[:for].map! { |v| [v, Greenwich::Utilities.get_time_field(v, column_names)] }
 
         define_method "#{name}" do
-          ActiveSupport::TimeZone.new(read_attribute(name))
+          time_zone_name = read_attribute(name)
+          ActiveSupport::TimeZone.new(time_zone_name) unless time_zone_name.nil?
         end
 
         define_method "#{name}=" do |time_zone|
           instance_eval do
             time_zone = ActiveSupport::TimeZone.new(time_zone) unless time_zone.is_a? ActiveSupport::TimeZone || time_zone.nil?