迁移报错

app/models/searchable/dependents/user.rb

@@ -8,7 +8,7 @@ module Searchable::Dependents::User
   private
 
   def check_searchable_dependents
-    if firstname_previously_changed? || lastname_previously_changed? || user_extension.school_id_previously_changed?
+    if firstname_previously_changed? || lastname_previously_changed? || user_extension&.school_id_previously_changed?
       # reindex shixun
       created_shixuns.each(&:reindex)
 

db/migrate/20190729080935_modify_login_for_users.rb

@@ -2,8 +2,8 @@ class ModifyLoginForUsers < ActiveRecord::Migration[5.2]
   def change
     users = User.where("created_on > '2019-07-26 19:00:00'")
     users.find_each do |use|
-      use.update_attributes(login: use.login.strip, phone: use.phone.try(:strip))
+      use.update_attributes(login: use.login&.strip, phone: use.phone&.strip)
-      use.user_extension.update_column(:student_id, use.user_extension.student_id.try(:strip))
+      use.user_extension.update_column(:student_id, use.user_extension&.student_id&.strip)
     end
   end
 end