fork实践课程的章节数，关卡数和实训的关卡数不对

app/services/subjects/copy_subject_service.rb

@@ -5,7 +5,8 @@ class Subjects::CopySubjectService < ApplicationService
     @subject = subject
     @user = user
     @laboratory = laboratory
-    subject_params = subject.attributes.dup.except('id', 'copy_subject_id', 'user_id', 'homepage_show')
+    subject_params = subject.attributes.dup.except('id', 'copy_subject_id', 'user_id', 'homepage_show',
+                                                   'stages_count', 'shixuns_count', 'stage_shixuns_count')
     @to_subject = Subject.new(subject_params)
   end
 
@@ -59,7 +60,7 @@ class Subjects::CopySubjectService < ApplicationService
     shixun = stage_shixun.shixun
     to_shixun = Shixun.new
     to_shixun.attributes = shixun.attributes.dup.except('id', 'user_id', 'identifier', 'homepage_show',
-                                                        'use_scope', 'averge_star', 'myshixuns_count')
+                                                        'use_scope', 'averge_star', 'myshixuns_count', 'challenges_count')
     to_shixun.identifier = Util::UUID.generate_identifier(Shixun, 8)
     to_shixun.user_id = user.id
     if laboratory