Submission time in Canvas LTI assignment changes to grading time

Bug #1831308 reported by Kristina Hoeppner on 2019-06-01
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Status tracked in 19.10

Bug Description

Tested with Canvas.

When an LTI assignment is graded, the submission time recorded in Canvas switches to the time the portfolio was graded, which causes problems when the grading time is past the due time for the assignment as the assignment is then marked as late submission even though it had been on time originally.

To replicate:

1. Set up an LTI assignment in Canvas that has a due date just a few minutes out.
2. Set the assignment settings as teacher.
3. Log in as student and submit a portfolio before the due date.
4. Wait until the due date has passed to grade the assignment as teacher.
5. Look into the gradebook.
Expected result: The submission time is the same as displayed when the portfolio was submitted (it can be seen on the Mahara screen in the grading table).
Actual result: The time switched to the grading time and now the portfolio is marked as late submission.

Tags: lti Edit Tag help
Paolo Oprandi (paolooprandi) wrote :

Just to confirm, the time graded should not be written as the submission time (as stated above), but I don't think that the submission time is written to Canvas at the point of a Mahara submission at all. Other external tools that are integrated with the Canvas assignment, such as Turnitin, will write the submission time and this will be very important feature for the way we integrate assignments with our student record system. Many thanks, Paolo

From a developer:

"This is a tricky one - the LMS has no knowledge of the student submission until a result is sent back to it. We have no result until it has been graded.

"Maybe we need to send a grade of zero on submission by the student, then update it when it is graded for real. "

Cavas has a non-standard solution:

See 'Submission Submitted At Timestamp Extension' here

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