forum/middleware/pagesize.py

   1 # used in questions
   2 QUESTIONS_PAGE_SIZE = 10
   3 class QuestionsPageSizeMiddleware(object):
   4     def process_request(self, request):
   5         # Set flag to False by default. If it is equal to True, then need to be saved.
   6         pagesize_changed = False
   7         # get pagesize from session, if failed then get default value
   8         user_page_size = request.session.get("pagesize", QUESTIONS_PAGE_SIZE)
   9         # set pagesize equal to logon user specified value in database
  10         if request.user.is_authenticated() and request.user.questions_per_page > 0:
  11             user_page_size = request.user.questions_per_page
  12
  13         try:
  14             # get new pagesize from UI selection
  15             pagesize = int(request.GET.get('pagesize', user_page_size))
  16             if pagesize <> user_page_size:
  17                 pagesize_changed = True
  18
  19         except ValueError:
  20             pagesize  = user_page_size
  21
  22         # save this pagesize to user database
  23         if pagesize_changed:
  24             if request.user.is_authenticated():
  25                 user = request.user
  26                 user.questions_per_page = pagesize
  27                 user.save()
  28         # put pagesize into session
  29         request.session["pagesize"] = pagesize
  30
  31     def process_exception(self,request,exception):
  32         import logging
  33         logging.debug('have exception %s' % str(exception))