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Fixed faulty nil checks produced by using .find instead of .find_by
Wrote more nil checks that redirect users to valid URLs
Motivation and Context
It prevents the website from responding with ruby errors, and redirects users to valid website and shows them their error.
Issue #2128
How Has This Been Tested?
grading.rb
Accessed /courses/:course_name/assessments/:assessment_name/score_grader_info/:id with an invalid id and made sure it redirects the user back to the assessment page
Accessed gradebook and made sure it shows the correct scores
course_user_data_controller.rb
Accessed /course/:course_name/course_user_data/:id with a valid id and made sure that it showed the user
Accessed /course/:course_name/course_user_data/:id with an invalid id and made sure that it went back to the user list with the correct error
courses_controller.rb
Ran MOSS cheat checker and made sure it works
groups_controller.rb
Created two assignments with two users, one with and one without a group. Imported the group into the one without a group
users_controller.rb
Accessed /users and checked there are users
Accessed /users/:id with valid user id and checked that it shows the user
Accessed /users/:id with an invalid user id and check that it goes back to /users
The recent changes enhance error handling and user interaction in specific controller actions. Notably, methods now check for the presence of records before performing actions, providing clear error messages and redirection when records are not found. Some methods, like destroy and destroyConfirm, have been removed to simplify controllers.
Changes
File
Change Summary
app/controllers/course_user_data_controller.rb
Added nil checks for show, edit, and update methods; removed destroy and destroyConfirm methods.
app/controllers/assessments_controller.rb
Enhanced grade method to check for @problem and @submission existence, added error handling and redirection.
Sequence Diagram(s)
Updated show method in course_user_data_controller.rb
sequenceDiagram
participant User
participant CourseUserDataController
User ->> CourseUserDataController: show(params[:id])
CourseUserDataController ->> CourseUserDataController: find_by(id: params[:id])
alt User found
CourseUserDataController ->> User: Render view with user
else User not found
CourseUserDataController ->> User: flash[:error], redirect_to users path
end
Loading
Updated grade method in assessments_controller.rb
sequenceDiagram
participant User
participant AssessmentsController
User ->> AssessmentsController: grade(params[:problem], params[:submission])
AssessmentsController ->> AssessmentsController: find_by(id: params[:problem])
alt Problem found
AssessmentsController ->> AssessmentsController: find_by(id: params[:submission])
alt Submission found
AssessmentsController ->> User: Render grade view
else Submission not found
AssessmentsController ->> User: flash[:error], redirect_to an action
end
else Problem not found
AssessmentsController ->> User: flash[:error], redirect_to an action
end
458-467: Improved nil handling using find_by and redirection.
The changes to use find_by instead of find for @problem and @submission are correctly implemented. The addition of nil checks and redirections enhances robustness by preventing errors when records are not found.
However, consider adding logging for these error cases to help with debugging and maintaining records of such events.
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coder6583
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Description
.findinstead of.find_byMotivation and Context
It prevents the website from responding with ruby errors, and redirects users to valid website and shows them their error.
Issue #2128
How Has This Been Tested?
grading.rb/courses/:course_name/assessments/:assessment_name/score_grader_info/:idwith an invalid id and made sure it redirects the user back to the assessment pagecourse_user_data_controller.rb/course/:course_name/course_user_data/:idwith a valid id and made sure that it showed the user/course/:course_name/course_user_data/:idwith an invalid id and made sure that it went back to the user list with the correct errorcourses_controller.rbgroups_controller.rbusers_controller.rb/usersand checked there are users/users/:idwith valid user id and checked that it shows the user/users/:idwith an invalid user id and check that it goes back to /usersschedulers_controller.rb,lti_nrps_controller.rb,updateGradebook.rbTypes of changes
Checklist:
overcommit --install && overcommit --signto use pre-commit hook for lintingOther issues / help required
I need some help on testing
schedulers_controller.rb,lti_nrps_controller.rb,updateGradebook.rb.