Delete previous tokens when creating a new one.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2778 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/token.rb

@@ -1,5 +1,5 @@
-# redMine - project management software
-# Copyright (C) 2006  Jean-Philippe Lang
+# Redmine - project management software
+# Copyright (C) 2006-2009  Jean-Philippe Lang
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -19,6 +19,8 @@ class Token < ActiveRecord::Base
   belongs_to :user
   validates_uniqueness_of :value
   
+  before_create :delete_previous_tokens
+  
   @@validity_time = 1.day
   
   def before_create
@@ -39,4 +41,11 @@ private
   def self.generate_token_value
     ActiveSupport::SecureRandom.hex(20)
   end
+  
+  # Removes obsolete tokens (same user and action)
+  def delete_previous_tokens
+    if user
+      Token.delete_all(['user_id = ? AND action = ?', user.id, action])
+    end
+  end
 end