1

lib/tasks/statistic_subject_info.rake

@@ -28,7 +28,7 @@ namespace :subjects do
           sql = "REPLACE INTO subject_records(#{column_value}) VALUES #{str.join(",")}"
           puts sql
           ActiveRecord::Base.connection.execute sql
-          str = ""
+          str = []
           buffer_size = 0
         end
       end