title: Django admin editable field - take action
body: <p>I have a question:
  In Django admin when you have a model with a column (BooleanField) and set it as editable in admin.py. Is it possible when you check &amp; save it to take some action ?
  I have an object, lets say Ticket, with various fields and another field named Status.
  I see all his fields in Django Admin (register it in admin.py) and when I set his Status to True &amp; save it, I want django admin to send an email lets say ... Is it possible, and if ... how ?
  Thank you very much folks &amp; Merry Christmas !</p>