1

db/migrate/20191223113620_modify_task_pass_for_challenges.rb

@@ -1,6 +1,7 @@
 class ModifyTaskPassForChallenges < ActiveRecord::Migration[5.2]
   def change
     challenge = Challenge.find(6917)
-    challenge.update_attribute(:task_pass, challenge.task_pass.gsub("", "").gsub("rac", "\frac"))
+    task_pass = challenge.task_pass.gsub("", "").gsub("rac", '\frac')
+    challenge.update_attribute(:task_pass, task_pass)
   end
 end