Log errors when versions can't be created

lib/paper_trail/has_paper_trail.rb

@@ -397,8 +397,12 @@ module PaperTrail
           end
           add_transaction_id_to(data)
           version = send(self.class.versions_association_name).create merge_metadata(data)
-          update_transaction_id(version)
-          save_associations(version)
+          if version.errors.any?
+            log_version_errors(version, :update)
+          else
+            update_transaction_id(version)
+            save_associations(version)
+          end
         end
       end
 
@@ -476,10 +480,14 @@ module PaperTrail
           }
           add_transaction_id_to(data)
           version = self.class.paper_trail_version_class.create(merge_metadata(data))
-          send("#{self.class.version_association_name}=", version)
-          send(self.class.versions_association_name).send :load_target
-          update_transaction_id(version)
-          save_associations(version)
+          if version.errors.any?
+            log_version_errors(version, :destroy)
+          else
+            send("#{self.class.version_association_name}=", version)
+            send(self.class.versions_association_name).send :load_target
+            update_transaction_id(version)
+            save_associations(version)
+          end
         end
       end
 
@@ -646,6 +654,13 @@ module PaperTrail
           version.save
         end
       end
+
+      def log_version_errors(version, action)
+        version.logger.warn(
+          "Unable to create version for #{action} of #{self.class.name}##{id}: " +
+          version.errors.full_messages.join(", ")
+        )
+      end
     end
   end
 end