竞赛通知的md编辑

db/migrate/20190715102143_migrate_competition_md_content.rb

@@ -0,0 +1,8 @@
+class MigrateCompetitionMdContent < ActiveRecord::Migration
+  def up
+    change_column :competition_module_md_contents, :content, :text
+  end
+
+  def down
+  end
+end