Fix: フィルター使用中にエラーが出る場合がある問題の暫定対応 (#395)

app/serializers/rest/filter_serializer.rb

@@ -12,4 +12,14 @@ class REST::FilterSerializer < ActiveModel::Serializer
   def rules_requested?
     instance_options[:rules_requested]
   end
+
+  # FIRST AID
+  # After the upstream is corrected, delete the following.
+  def title
+    object.phrase
+  end
+
+  def filter_action
+    object.action
+  end
 end