diff --git a/db/migrate/20190805010562_modify_ke_contents_for_markdown.rb b/db/migrate/20190805010562_modify_ke_contents_for_markdown.rb
index 50388612d..958b70448 100644
--- a/db/migrate/20190805010562_modify_ke_contents_for_markdown.rb
+++ b/db/migrate/20190805010562_modify_ke_contents_for_markdown.rb
@@ -1,13 +1,13 @@
 class ModifyKeContentsForMarkdown < 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 table td tr tbody pre), attributes: %w(src href target style))
-      s_contents.gsub(">\n<", "><").gsub(/^\n/, "").gsub(" ", "").gsub(/(\n)+/, "<br />")
-          .gsub("\t", "").gsub("\n", "").gsub("    ", "&nbsp;&nbsp;&nbsp;&nbsp;").gsub(/(<br\s?\/?>)+/, "<br />")
-      s_contents.gsub("\n", "<br />").gsub(/(<br\s?\/?>)+/, "<br />")
-    end
+    # def ke_transform_to_md content
+    #   return content if content.blank?
+    #   s_contents = sanitize(content, tags: %w(img a table td tr tbody pre), attributes: %w(src href target style))
+    #   s_contents.gsub(">\n<", "><").gsub(/^\n/, "").gsub(" ", "").gsub(/(\n)+/, "<br />")
+    #       .gsub("\t", "").gsub("\n", "").gsub("    ", "&nbsp;&nbsp;&nbsp;&nbsp;").gsub(/(<br\s?\/?>)+/, "<br />")
+    #   s_contents.gsub("\n", "<br />").gsub(/(<br\s?\/?>)+/, "<br />")
+    # end
     #
     # # 课程讨论区
     # MessageDetail.find_each do |m|
@@ -16,12 +16,12 @@ class ModifyKeContentsForMarkdown < ActiveRecord::Migration[5.2]
     # end
 
     #试卷的标题
-    ExerciseQuestion.where(:exercise_id => 1892).find_each do |eq|
-      puts("#eq.question_title: #{eq.question_title}")
-      question_title = ke_transform_to_md eq.question_title
-      puts("#question_title: #{question_title}")
-      eq.update_column(:question_title, question_title)
-    end
+    # ExerciseQuestion.where(:exercise_id => 1892).find_each do |eq|
+    #   puts("#eq.question_title: #{eq.question_title}")
+    #   question_title = ke_transform_to_md eq.question_title
+    #   puts("#question_title: #{question_title}")
+    #   eq.update_column(:question_title, question_title)
+    # end
 
     # # 试卷的答案
     # ExerciseStandardAnswer.find_each do |esa|