1

lib/tasks/statistic_subject_info.rake

@@ -8,9 +8,11 @@ namespace :subjects do
     column_value = "subject_id, study_count, course_study_count, initiative_study, passed_count, course_used_count, " +
         "school_used_count, created_at, updated_at"
     subjects.find_in_batches(batch_size: 50) do |s|
-      str = ""
-      buffer_size = 0
       Parallel.each_with_index(s, in_processes: 4) do |subject, index|
+        if subject == s.first
+          buffer_size == 0
+          str == ""
+        end
         buffer_size += 1
         str += ", " unless str.empty?
         puts("---------------------data_statistic: #{subject.id}")