实践课程的实训数量

db/migrate/20190824032658_migrate_subject_shixun_count.rb

@@ -0,0 +1,9 @@
+class MigrateSubjectShixunCount < ActiveRecord::Migration[5.2]
+  def change
+    Subject.reset_column_information
+    Subject.all.each do |subject|
+      Subject.reset_counters subject.id, :stage_shixuns
+      Subject.reset_counters subject.id, :shixuns
+    end
+  end
+end