title: with Symfony sfDoctrineGuardPlugin, users can open a page which actually they cannot by changing url
body: <p>I am using Symfony 1.4, sfDoctrineGuardPlugin. </p>
  
  <p>On my backend app, users can reach a page which they cannot actually by changing url manually. Is there any way to stop it? </p>
  
  <p>Lets say, every author can just reach their own data normally. But if they change id on url they can edit which article they want. I searched on the internet but cannot find any solution for it? Do you know a way?</p>
  
  <p>Thanks a lot.</p>