problem with django: use __year or not && use subversion or not

when i put the new sources in the remote web server, and something happened!

the query result had nothing!! when i 'diff' the environment of server and mine, i got one thing difference. one is python 2.5.2 and the other is 2.5.1, but i have no idea about why!

the problem is 『__year』, i set a datetime field in a django model, and i can query it by year with suffix parameter __year like filter(date__year=datetime.date.today().year). and it's work for mine but not for remote server. so for the general case, i changed the code to two queries like below:

filter(date__gte=datetime.date(datetime.date.today().year, 1,1), date__lte=datetime.date(datetime.date.today().year, 12,31))

then i changed 5 files in my application. before svn commit, i use svn diff to see what i modified and found a error.

Can you see??

--- apps/supervise/views.py     (revision 1256)
+++ apps/supervise/views.py     (working copy)
@@ -145,7 +145,8 @@
if h.has_key('year') and h['year'] != '':
    Y = Year.objects.get(id=h['year'])
    try:
-            sc = sc.filter(date__year=Y.date.year)
+            sc = sc.filter(date__get=datetime.date(Y.date.year, 1, 1),
+            date__lte=datetime.date(Y.date.year, 12, 31))
    except:
        pass
........

if i have no subversion, i will write a bug after a debug.