diff options
| -rw-r--r-- | activesupport/lib/active_support/duration.rb | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/duration.rb b/activesupport/lib/active_support/duration.rb index 3696697224..8e518cb00b 100644 --- a/activesupport/lib/active_support/duration.rb +++ b/activesupport/lib/active_support/duration.rb @@ -65,13 +65,13 @@ module ActiveSupport def sum(sign, time = ::Time.now) #:nodoc: parts.inject(time) do |t,(type,number)| - if t.respond_to?(:sec) # quacks like a Time + if t.acts_like?(:time) if type == :seconds t + (sign * number) else t.advance(type => sign * number) end - elsif t.respond_to?(:day) # quacks like a Date + elsif t.acts_like?(:date) raise ArgumentError, "Adding seconds to a Date does not make sense" if type == :seconds t.advance(type => sign * number) else |