Merge pull request #1 from askelof/rails4

rails 4対応
cctiger36 · Jan 14, 2014 · be58a56 · be58a56
2 parents 2b2215f + 1544b43
commit be58a56
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/model_observer/metric.rb b/lib/model_observer/metric.rb
@@ -4,7 +4,7 @@ class Metric
 
     def initialize(model, started_at, ended_at)
       @model_class = model.class
-      @model_id = model.__send__(model.class.primary_key)
+      @model_id = model.__send__(model.class.primary_key) if model.class.primary_key
       @started_at = started_at
       @ended_at = ended_at
     end