Don't generate new customer view token every time

app/controllers/customers_controller.rb

@@ -134,6 +134,23 @@ class CustomersController < ApplicationController
     end
   end
 
+  # creates new customer view tokens, removes expired tokens & redirects to newly created customer view with new token.
+  def share
+
+    Thread.new do
+      logger.debug "Removing expired customer tokens"
+      CustomerToken.remove_expired_tokens
+      ActiveRecord::Base.connection.close
+    end
+
+    begin
+      issue = Issue.find_by_id(params[:id])
+      redirect_to "#{Redmine::Utils::relative_url_root}/customers/view/#{issue.share_token.token}"
+    rescue
+      render_404
+    end
+  end
+  
   # displays an issue for a customer with a provided security CustomerToken
   def view
 

app/models/customer_token.rb

@@ -11,7 +11,6 @@
 class CustomerToken < ActiveRecord::Base
   unloadable
   has_many :issues
-  #attr_accessible :token, :expires_at, :issue_id
   validates_presence_of :expires_at, :issue_id
   before_create :generate_token
 
@@ -20,4 +19,9 @@ class CustomerToken < ActiveRecord::Base
   def generate_token
     self.token = SecureRandom.base64(15).tr('+/=lIO0', OAUTH_CONSUMER_SECRET)
   end
+
+  def remove_expired_tokens
+    CustomerToken.where("expires_at < ?", Time.now).destroy_all
+  end
+
 end