just use core methods

drogus · Dec 9, 2010 · b2a0425 · b2a0425
1 parent 1860d87
commit b2a0425
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/activerecord/lib/active_record/observer.rb b/activerecord/lib/active_record/observer.rb
@@ -98,7 +98,7 @@ def initialize
     protected
 
       def observed_descendants
-        observed_classes.sum([]) { |klass| klass.descendants }
+        observed_classes.map { |klass| klass.descendants }.flatten
       end
 
       def add_observer!(klass)