diff --git a/db/migrate/20190806062209_second_mofidy_ke_contents_for_md.rb b/db/migrate/20190806062209_second_mofidy_ke_contents_for_md.rb
index 3ba6f67f5..c8068e049 100644
--- a/db/migrate/20190806062209_second_mofidy_ke_contents_for_md.rb
+++ b/db/migrate/20190806062209_second_mofidy_ke_contents_for_md.rb
@@ -1,64 +1,64 @@
 class SecondMofidyKeContentsForMd < ActiveRecord::Migration[5.2]
   include ActionView::Helpers::SanitizeHelper
   def change
-    def ke_transform_to_md content
-      return content if content.blank?
-      s_contents = sanitize(content, tags: %w(img a span table td tr tbody pre), attributes: %w(src href target style))
-      s_contents.gsub(">\n<", "><").gsub(/^\n/, "").gsub(" ", "&nbsp;").gsub(/(\n)+/, "<br />")
-          .gsub("\t", "&nbsp;&nbsp;&nbsp;&nbsp;").gsub("\n", "").gsub(" ", "&nbsp;").gsub(/(<br\s?\/?>)+/, "<br />")
-
-    end
-
-    # 作业
-    HomeworkCommon.find_each do |hc|
-      description = ke_transform_to_md hc.description
-      reference_answer = ke_transform_to_md hc.reference_answer
-      explanation = ke_transform_to_md hc.explanation
-      hc.update_attributes(description: description, reference_answer: reference_answer, explanation: explanation)
-    end
-
-    # 作业题库
-    HomeworkBank.find_each do |hb|
-      description = ke_transform_to_md hb.description
-      reference_answer = ke_transform_to_md hb.reference_answer
-      hb.update_attributes(description: description, reference_answer: reference_answer)
-    end
-
-    # 毕业任务
-    GraduationTask.find_each do |gt|
-      description = ke_transform_to_md gt.description
-      gt.update_column(:description, description)
-    end
-
-    # 毕设选题
-    GraduationTopic.find_each do |gt|
-      description = ke_transform_to_md gt.description
-      gt.update_column(:description, description)
-    end
-
-    # 毕设作品
-    GraduationWork.find_each do |gw|
-      description = ke_transform_to_md gw.description
-      gw.update_column(:description, description)
-    end
-
-    # 毕设任务题库
-    GtaskBank.find_each do |gb|
-      description = ke_transform_to_md gb.description
-      gb.update_column(:description, description)
-    end
-
-    # 毕设选题题库
-    GtopicBank.find_each do |gb|
-      description = ke_transform_to_md gb.description
-      gb.update_column(:description, description)
-    end
-
-    # 交流问答
-    Memo.find_each do |m|
-      content = ke_transform_to_md m.content
-      m.update_column(:content, content)
-    end
+    # def ke_transform_to_md content
+    #   return content if content.blank?
+    #   s_contents = sanitize(content, tags: %w(img a span table td tr tbody pre), attributes: %w(src href target style))
+    #   s_contents.gsub(">\n<", "><").gsub(/^\n/, "").gsub(" ", "&nbsp;").gsub(/(\n)+/, "<br />")
+    #       .gsub("\t", "&nbsp;&nbsp;&nbsp;&nbsp;").gsub("\n", "").gsub(" ", "&nbsp;").gsub(/(<br\s?\/?>)+/, "<br />")
+    #
+    # end
+    #
+    # # 作业
+    # HomeworkCommon.find_each do |hc|
+    #   description = ke_transform_to_md hc.description
+    #   reference_answer = ke_transform_to_md hc.reference_answer
+    #   explanation = ke_transform_to_md hc.explanation
+    #   hc.update_attributes(description: description, reference_answer: reference_answer, explanation: explanation)
+    # end
+    #
+    # # 作业题库
+    # HomeworkBank.find_each do |hb|
+    #   description = ke_transform_to_md hb.description
+    #   reference_answer = ke_transform_to_md hb.reference_answer
+    #   hb.update_attributes(description: description, reference_answer: reference_answer)
+    # end
+    #
+    # # 毕业任务
+    # GraduationTask.find_each do |gt|
+    #   description = ke_transform_to_md gt.description
+    #   gt.update_column(:description, description)
+    # end
+    #
+    # # 毕设选题
+    # GraduationTopic.find_each do |gt|
+    #   description = ke_transform_to_md gt.description
+    #   gt.update_column(:description, description)
+    # end
+    #
+    # # 毕设作品
+    # GraduationWork.find_each do |gw|
+    #   description = ke_transform_to_md gw.description
+    #   gw.update_column(:description, description)
+    # end
+    #
+    # # 毕设任务题库
+    # GtaskBank.find_each do |gb|
+    #   description = ke_transform_to_md gb.description
+    #   gb.update_column(:description, description)
+    # end
+    #
+    # # 毕设选题题库
+    # GtopicBank.find_each do |gb|
+    #   description = ke_transform_to_md gb.description
+    #   gb.update_column(:description, description)
+    # end
+    #
+    # # 交流问答
+    # Memo.find_each do |m|
+    #   content = ke_transform_to_md m.content
+    #   m.update_column(:content, content)
+    # end
 
   end
 end
diff --git a/db/migrate/20190806063903_third_modify_ke_for_student_work.rb b/db/migrate/20190806063903_third_modify_ke_for_student_work.rb
index 7af64bac1..0b1be8d00 100644
--- a/db/migrate/20190806063903_third_modify_ke_for_student_work.rb
+++ b/db/migrate/20190806063903_third_modify_ke_for_student_work.rb
@@ -1,17 +1,17 @@
 class ThirdModifyKeForStudentWork < ActiveRecord::Migration[5.2]
   include ActionView::Helpers::SanitizeHelper
   def change
-    def ke_transform_to_md content
-      return content if content.blank?
-      s_contents = sanitize(content, tags: %w(img a span table td tr tbody pre), attributes: %w(src href target style))
-      s_contents.gsub(">\n<", "><").gsub(/^\n/, "").gsub(" ", "&nbsp;").gsub(/(\n)+/, "<br />")
-          .gsub("\t", "&nbsp;&nbsp;&nbsp;&nbsp;").gsub("\n", "").gsub(" ", "&nbsp;").gsub(/(<br\s?\/?>)+/, "<br />")
-    end
-
-    # 学生的作品 过滤掉一些描述的ke图片的作品
-    StudentWork.where("description is not null and LENGTH(description) < 1000000").find_each do |sw|
-        description  = ke_transform_to_md sw.description
-        sw.update_column(:description, description)
-    end
+    # def ke_transform_to_md content
+    #   return content if content.blank?
+    #   s_contents = sanitize(content, tags: %w(img a span table td tr tbody pre), attributes: %w(src href target style))
+    #   s_contents.gsub(">\n<", "><").gsub(/^\n/, "").gsub(" ", "&nbsp;").gsub(/(\n)+/, "<br />")
+    #       .gsub("\t", "&nbsp;&nbsp;&nbsp;&nbsp;").gsub("\n", "").gsub(" ", "&nbsp;").gsub(/(<br\s?\/?>)+/, "<br />")
+    # end
+    #
+    # # 学生的作品 过滤掉一些描述的ke图片的作品
+    # StudentWork.where("description is not null and LENGTH(description) < 1000000").find_each do |sw|
+    #     description  = ke_transform_to_md sw.description
+    #     sw.update_column(:description, description)
+    # end
   end
 end