© 2004
Canonical Ltd.
•
Terms of use
•
Data privacy
•
Contact Launchpad Support
•
Blog
•
Careers
•
System status
•
35a32c5
(Get the code!)
It looks like it is related to the timestamp of the checkin effective time. The time part is hidden in Effective Date. But it's actually different on regular backdated checkin and backdated post checkin.
When I do a regular backdated checkin, I choose Jan 2, 2014 as the Effective Date. The checkin_time in action.circulation is 2014-01-02 23:59:00-08. When do a backdate post checkin, I choose Dec 26, 2013 as the Effective Date, the checkin time in action.circulation is 2013-12-26 00:00:00-08. All fines bear the timestamp of 23:59:59. So Dec 26 is voided.