Fix quiz submission bug

[AarifLamat]

Currently there is a bug whereby upon quiz submission, the user is redirected back to the quiz start page

A few tests should be created

• after a quiz is submitted the user should be redirected to /quiz not /quiz/[id]
• does the restart un-submit the quiz attempt?
• does the restart create another quiz attempt when you click start?
• how does the restart affect the quiz-attempts page in dashboard/results/[id]/quiz-attempts/

[github-actions]

Branch issue-204-Fix_quiz_submission_bug created!

[ErikaKK]

Found some bugs:

• 1. student view left navbar doesn't show
• 2. quiz app view.py didn't filter competition properly.
• 3. quiz model status field is very hard to understand. Considering replace it with date filtering or setting visible field

# models.py
# 0 for normal practice, 1 for upcoming, 2 for ongoing, 3 for finished
    status = models.IntegerField(default=0)

# views.py
class CompetitionQuizViewSet(viewsets.ReadOnlyModelViewSet):
    queryset = Quiz.objects.filter(
        status=1, visible=True, is_comp=True).order_by("-created_at")
    serializer_class = UserQuizSerializer

• 4. didn't have attempts in the sidebar for students. It seems we haven't implemented this feature
• 5. After login as a student, the mobile view shows login instead of dashboard. The mobile nav has a red border
  
• 6. Visitors can also see competition.
  
• 7. when the question is the last one, this button should change to submit

• 8. when a comp has already finished, you can still start the quiz

• 9. Once a student submitted a comp, I can still start the comp

• 10. couldn't get matching user id from student model

# server/api/users/serializers.py > StudentSerializer
class Meta:
        model = Student
        exclude = ["user"]

• 11. answer is auto filled for same question. Will it only store one attempt for each question?

[ErikaKK]

Solved 8 by comparing the ending time and current time and changing this button:

Solved this issue by adding filter and change button style at the quiz entry:

[ErikaKK]

Some TODOs in the competition components need to be finished