Here is a strange one for you:
I am using rails 2.1.0. I am also using the Time zones feature.
I have a User model that has many enrollments. The Enrollments model
has several named scopes, one of which is today:
This named scope is adjusted to UTC
named_scope :today, :conditions => [“updated_at >= ? AND updated_at
<= ?”,
Time.zone.now.beginning_of_day.utc, Time.zone.now.end_of_day.utc]
If I start the server and use user.enrollments.today, I get back
today’s enrollments, as you would expect. Once tomorrow arrives, and
I utilize the same query, I get yesterday’s enrollments. I have put
the server’s logger in debug mode to capture the queries and sure
enough, it is asking for yesterday’s enrollments.
First day’s log:
Processing CoursesController#show (for 66.249.102.37 at 2008-10-07
13:24:35) [GET]
…
maxed_out_hours_for_today?() begin
calculate_hours_today() begin
hours_today: 0.0
[4;36;1mEnrollment Load (0.001272) [0m [0;1mSELECT * FROM
enrollments
WHERE (enrollments
.user_id = 213) AND (((updated_at >=
‘2008-10-07 04:00:00’ AND updated_at <= ‘2008-10-08 03:59:59’) AND
(mode = ‘evaluated’)) AND (exam_id IS NULL)) [0m
Found 6 enrollments for user **********
Second day’s log:
Processing CoursesController#show (for 66.249.102.37 at 2008-10-08
07:22:19) [GET]
…
[4;35;1mEnrollment Load (0.001750) [0m [0mSELECT * FROM
enrollments
WHERE (enrollments
.user_id = 213) AND (((updated_at >=
‘2008-10-07 04:00:00’ AND updated_at <= ‘2008-10-08 03:59:59’) AND
(mode = ‘evaluated’)) AND (exam_id IS NULL)) [0m
Found 6 enrollments for user *************
Notice that the dates are the same on both days. This makes no sense
because Time.zone.now.beginning_of_day.utc and
Time.zone.now.end_of_day.utc are what is being used in teh
named_scope. It does not seem to be a time zone issue, as we are in
CDT, which is -5 from UTC right now. The second day’s query is
outside of the possible 5 hour overlap if I was making a mistake.
Does anyone have any idea what could be causing this?