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If a person is listed as a TA in one course and as a student in another course, then if they navigate to the "Your scores" page of one of the assignments in which they are participating as a student, they can see a TA's view of that page - effectively allowing them to assign their own grade! | If a person is listed as a TA in one course and as a student in another course, then if they navigate to the "Your scores" page of one of the assignments in which they are participating as a student, they can see a TA's view of that page - effectively allowing them to assign their own grade! | ||
The below screenshot shows the TA view for the course he is added as the TA: | '''The below screenshot shows the TA view for the course he is added as the TA:''' | ||
[[File:E2057_TA_view.png|850px]] | [[File:E2057_TA_view.png|850px]] | ||
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As evident from the screenshot, the user, "student003" is assigned as a TA for CSC502. | As evident from the screenshot, the user, "student003" is assigned as a TA for CSC502. | ||
The user, "student003" is also a student in the course, CSC501: | |||
'''The user, "student003" is also a student in the course, CSC501:''' | |||
[[File:E2057_view_student.png|850px]] | [[File:E2057_view_student.png|850px]] | ||
The issue here is that this user, "student003" who is a TA in one course is able to alter the grades for his assignments in other courses he is taking in the semester: | |||
'''The issue here is that this user, "student003" who is a TA in one course is able to alter the grades for his assignments in other courses he is taking in the semester:''' | |||
[[File:E2057_edit_grade.png|850px]] | [[File:E2057_edit_grade.png|850px]] | ||
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Only for the courses for which a user is a TA, he will be able to see 'TA Grade-Comment:' section under Assignment > view scores | Only for the courses for which a user is a TA, he will be able to see 'TA Grade-Comment:' section under Assignment > view scores | ||
[[File:E2057_view_team.png|850px]] | [[File:E2057_view_team.png|850px]] | ||
The green-highlighted lines indicate the changes. | The green-highlighted lines indicate the changes. | ||
Below is the screenshot which indicates the TA view for which the user is registered as a student: | |||
[[File:E2057_student_view_fix.png|850px]] | [[File:E2057_student_view_fix.png|850px]] | ||
Revision as of 03:10, 11 October 2020
E2057. Time travel Not Allowed..!!! Restrict TAs’ ability to change their own grade + limit file-size upload
This page provides a description of the Expertiza based OSS project.
Problem Statement
If a person is listed as a TA in one course and as a student in another course, then if they navigate to the "Your scores" page of one of the assignments in which they are participating as a student, they can see a TA's view of that page - effectively allowing them to assign their own grade!
The below screenshot shows the TA view for the course he is added as the TA:
As evident from the screenshot, the user, "student003" is assigned as a TA for CSC502.
The user, "student003" is also a student in the course, CSC501:
The issue here is that this user, "student003" who is a TA in one course is able to alter the grades for his assignments in other courses he is taking in the semester:
Solutions
Once TA clicks on Assignment > view scores, they will no longer be able to see the form to add/edit the grade and comment for the course in which they are participating as a student.
Files modified: view_team.html
We are rendering the TA view(to grade and comment) only if the TA ID has an entry in the ta_mapping table. This ensures that the TA will be able modify the grades for courses for which they are assigned as TA.
- Get the course ID for the course which the student is currently viewing.
- Get the user ID, which will be teacher ID as well
- Using these two fields we are restricting the access for the student to modify the grades.
Only for the courses for which a user is a TA, he will be able to see 'TA Grade-Comment:' section under Assignment > view scores
The green-highlighted lines indicate the changes.
Below is the screenshot which indicates the TA view for which the user is registered as a student:
