过关任务迁移

db/migrate/20191223113621_modify_task_pass_for_challenges.rb

@@ -1,7 +1,8 @@
 class ModifyTaskPassForChallenges < ActiveRecord::Migration[5.2]
   def change
-    challenge = Challenge.find(6917)
-    task_pass = challenge.task_pass.gsub("", "").gsub("rac", '\frac')
-    challenge.update_attribute(:task_pass, task_pass)
+    Challenge.find_each do |challenge|
+      task_pass = challenge.task_pass.gsub("", "").gsub("rac", '\frac')
+      challenge.update_attribute(:task_pass, task_pass)
+    end
   end
 end