diff options
Diffstat (limited to 'lib/observer.rb')
| -rw-r--r-- | lib/observer.rb | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/observer.rb b/lib/observer.rb index 08e75f5125..e1b249e885 100644 --- a/lib/observer.rb +++ b/lib/observer.rb @@ -5,7 +5,7 @@ module Observable def add_observer(observer) @observer_peers = [] unless defined? @observer_peers - unless defined? observer.update + unless observer.respond_to? :update raise NameError, "observer needs to respond to `update'" end @observer_peers.push observer |