fix error

lib/universal_table/engine.rb

@@ -1,6 +1,21 @@
 module UniversalTable
   class Engine < ::Rails::Engine
-    initializer "universal_table" do 
+    initializer "universal_table" do
+      if ENV['worker_num']=='0' && File.basename($0) != 'rake' && !Rails.const_defined?('Console')
+        require File.expand_path('../../../app/models/table_entry', __FILE__)
+        require File.expand_path('../../../app/models/u_table', __FILE__)
+        if defined?(TableEntry) && defined?(UTable)
+          if TableEntry.where(sort_number: nil).count>0
+            UTable.all.pluck(:id).each do |u_table_id|
+              table_entries = TableEntry.where(u_table_id: u_table_id).order_by(id: 1)
+              table_entry_ids = table_entries.pluck(:id)
+              table_entry_ids.each_with_index do |id,i|
+                TableEntry.where(id: id).update(sort_number: i)
+              end
+            end
+          end
+        end
+      end
       OrbitApp.registration "UniversalTable", :type => "ModuleApp" do
         module_label "universal_table.universal_table"
         base_url File.expand_path File.dirname(__FILE__)