fixed 多浏览器退出账号时，token不存在处理

app/models/token.rb

@@ -1,19 +1,19 @@
-# == Schema Information
-#
-# Table name: tokens
-#
-#  id         :integer          not null, primary key
-#  user_id    :integer          default("0"), not null
-#  action     :string(30)       default(""), not null
-#  value      :string(40)       default(""), not null
-#  created_on :datetime         not null
-#
-# Indexes
-#
-#  index_tokens_on_user_id  (user_id)
-#  tokens_value             (value) UNIQUE
-#
-
+# == Schema Information
+#
+# Table name: tokens
+#
+#  id         :integer          not null, primary key
+#  user_id    :integer          default("0"), not null
+#  action     :string(30)       default(""), not null
+#  value      :string(40)       default(""), not null
+#  created_on :datetime         not null
+#
+# Indexes
+#
+#  index_tokens_on_user_id  (user_id)
+#  tokens_value             (value) UNIQUE
+#
+
 
 #
 # This program is free software; you can redistribute it and/or
@@ -44,7 +44,7 @@ class Token < ActiveRecord::Base
 
   def self.get_or_create_permanent_login_token(user, type)
     token = Token.get_token_from_user(user, type)
-    Rails.logger.info "###### Token.get_token_from_user result: #{token&.value}"
+    Rails.logger.info "###### Token.get_token_from_user time:#{Time.new.to_i}, result: #{token&.value}"
     unless token
       token = Token.create(:user => user, :action => type)
       Rails.logger.info "###### Token.get_token_from_user is nul and agine create token: #{token&.value}"
@@ -117,8 +117,8 @@ class Token < ActiveRecord::Base
 
   # Removes obsolete tokens (same user and action)
   def delete_previous_tokens
-    if user
-      Token.where(['user_id = ? AND action = ?', user.id, action]).delete_all
-    end
+    # if user
+      # Token.where(['user_id = ? AND action = ?', user.id, action]).delete_all
+    # end
   end
 end