From 16439f8b00ca909798eee0dadde901215634acab Mon Sep 17 00:00:00 2001
From: Evgeny Fadeev <evgeny.fadeev@gmail.com>
Date: Sat, 1 Sep 2012 14:59:03 -0400
Subject: simplified the clean_session command

---
 askbot/management/commands/clean_session.py | 47 +++++++++++------------------
 1 file changed, 17 insertions(+), 30 deletions(-)

diff --git a/askbot/management/commands/clean_session.py b/askbot/management/commands/clean_session.py
index 6ba9352c..6800420b 100644
--- a/askbot/management/commands/clean_session.py
+++ b/askbot/management/commands/clean_session.py
@@ -1,13 +1,15 @@
+"""deletes expired sessions from the session database table
+works only when sessions are stored in the database
+"""
 from django.core.management.base import NoArgsCommand
 from django.contrib.sessions.models import Session
-from django.db import transaction
 from optparse import make_option
-from askbot.utils.console import print_progress
+from askbot.utils.console import ProgressBar
 from datetime import datetime
 
-DELETE_LIMIT = 1000
-
 class Command(NoArgsCommand):
+    """Django management command class"""
+
     option_list = NoArgsCommand.option_list + (
             make_option('--quiet',
                 action='store_true',
@@ -17,34 +19,19 @@ class Command(NoArgsCommand):
                 ),
             )
 
-    @transaction.commit_manually
     def handle_noargs(self, **options):
-        '''deletes old sessions'''
+        """deletes old sessions"""
         quiet = options.get('quiet', False)
-        expired_session_count  = Session.objects.filter(expire_date__lt=datetime.now()).count()
-        expired_session_list= Session.objects.filter(expire_date__lt=datetime.now()).values_list('session_key', flat=True)
-        transaction.commit()
-
-        if not quiet:
-            print "There are %d expired sessions" % expired_session_count
-
-        range_limit = len(expired_session_list) - 1
-        higher_limit = lower_limit = 0
 
-        for i in range(DELETE_LIMIT, range_limit, DELETE_LIMIT):
-            lower_limit = i
-            higher_limit = lower_limit + DELETE_LIMIT
-            sublist = expired_session_list[lower_limit:higher_limit]
-            Session.objects.filter(session_key__in = sublist).delete()
-            transaction.commit()
-            if not quiet:
-                print_progress(higher_limit-1, expired_session_count)
+        expired_sessions = Session.objects.filter(
+                                expire_date__lt=datetime.now()
+                            )
+        count = expired_sessions.count()
+        expired_sessions = expired_sessions.iterator()
+        if quiet is False:
+            message = 'There are %d expired sessions' % count
+            expired_sessions = ProgressBar(expired_sessions, count, message)
 
-        if higher_limit < expired_session_list:
-            sublist = expired_session_list[higher_limit:expired_session_count]
-            Session.objects.filter(session_key__in = sublist).delete()
-            print_progress(expired_session_count, expired_session_count)
-            transaction.commit()
+        for session in expired_sessions:
+            session.delete()
 
-        if not quiet:
-            print "sessions cleared"
-- 
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