调整

app/controllers/welcome_controller.rb

@@ -667,7 +667,7 @@ class WelcomeController < ApplicationController
     if local_mirrors.present?
       local_mirrors.each do |local_mirror|
         local_mirror_new = MirrorRepository.where(type_name: local_mirror.try(:type_name)).first
-        ShixunMirrorRepository.create!(:shixun_id => shixun.id, :mirror_repository_id => local_mirror_new.id)
+        ShixunMirrorRepository.create!(:shixun_id => shixun.id, :mirror_repository_id => local_mirror_new.try(:id))
       end
     end