title: how to retrieve id as hidden value in form so that the value get stored as foreign key in the database in django
body: <p>i am unable to extend admin inteface
  i tried to extend but it didnt'worked</p>
  
  <p>in settings.py 
   os.path.join(BASE_DIR, "Sfolder"),</p>
  
  <p>so in root folder
  there is sfolder inside there 
  admin/base_site.html
  inside base_site.html </p>
  
  <pre><code>{% extends 'admin/base.html' %}
  
  </code></pre>
  
  <p>it didn't override the base.html</p>