From 5a4e2ea7928fe70f0d89bc80ecb850a5eb4e849c Mon Sep 17 00:00:00 2001
From: Magnus Hagander <magnus@hagander.net>
Date: Wed, 30 Jan 2013 11:41:14 +0100
Subject: [PATCH] Make filters in admin be sticky, according to:
 http://code.djangoproject.com/ticket/3777

---
 pgweb/util/middleware.py | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/pgweb/util/middleware.py b/pgweb/util/middleware.py
index ab0523b8..a8be133f 100644
--- a/pgweb/util/middleware.py
+++ b/pgweb/util/middleware.py
@@ -42,7 +42,34 @@ class PgMiddleware(object):
 
 		return None
 
-# Thread local store for username, see comment at the top of this file
 	def process_request(self, request):
+# Thread local store for username, see comment at the top of this file
 		_thread_locals.user = getattr(request, 'user', None)
 
+# Per django ticket #3777, make filters in admin be sticky
+		path = request.path
+		if path.find('/admin/') != -1:
+			query_string = request.META['QUERY_STRING']
+			if not request.META.has_key('HTTP_REFERER'):
+				return None
+			session = request.session
+			if session.get('redirected', False):
+				del session['redirected']
+				return None
+			referrer = request.META['HTTP_REFERER'].split('?')[0]
+			referrer = referrer[referrer.find('/admin'):len(referrer)]
+			key = 'key'+path.replace('/','_')
+			if path == referrer:
+				if query_string == '':
+					if session.get(key,False):
+						del session[key]
+					return None
+				request.session[key] = query_string
+			else:
+				if session.get(key,False):
+					query_string=request.session.get(key)
+					redirect_to = path+'?'+query_string
+					request.session['redirected'] = True
+					return HttpResponseRedirect(redirect_to)
+				else:
+					return None