实践课程任务

lib/tasks/statistic_subject_info.rake

@@ -7,12 +7,10 @@ namespace :subjects do
     subjects = Subject.where(status: 2, hidden: 0)
     column_value = "subject_id, study_count, course_study_count, initiative_study, passed_count, course_used_count, " +
         "school_used_count, created_at, updated_at"
+    buffer_size = 0
+    str = ""
     subjects.find_in_batches(batch_size: 50) do |s|
       Parallel.each_with_index(s, in_processes: 4) do |subject, index|
-        if defined?(buffer_size).nil?
-          buffer_size = 0
-          str = ""
-        end
         buffer_size += 1
         str += ", " unless str.empty?
         puts("---------------------data_statistic: #{subject.id}")