迁移测试用户的高校

db/migrate/20190726101533_modify_test_user_for_school.rb

@@ -0,0 +1,13 @@
+class ModifyTestUserForSchool < ActiveRecord::Migration
+  def up
+    school_ids = School.pluck(:id)
+    users = User.where(is_test: true).includes(:user_extensions)
+    users.find_each do |u|
+      school_id = school_ids.sample
+      u.user_extensions.update_column(:school_id, school_id) if u.user_extensions.present?
+    end
+  end
+
+  def down
+  end
+end