Merge pull request #725 from alphagov/enable-enumerate-columns-setting

 Prevent ActiveRecord errors when adding columns

Author: DavidBiddle

config/application.rb

@@ -67,5 +67,8 @@ class Application < Rails::Application
         h[:trace_id] = event.payload[:trace_id] if event.payload[:trace_id]
       end
     end
+
+    # Prevent ActiveRecord::PreparedStatementCacheExpired errors when adding columns
+    config.active_record.enumerate_columns_in_select_statements = true
   end
 end