from django.contrib import messages
from django.contrib.auth import login
from django.contrib.auth.decorators import login_required
from django.db import transaction
from django.db.models import Count
from django.shortcuts import get_object_or_404, redirect, render
from django.urls import reverse_lazy
from django.utils.decorators import method_decorator
from django.views.generic import CreateView, ListView, UpdateView
from ..decorators import student_required
from ..forms import StudentInterestsForm, StudentSignUpForm, TakeQuizForm
from ..models import Quiz, Student, TakenQuiz, User
class StudentSignUpView(CreateView):
model = User
form_class = StudentSignUpForm
template_name = 'registration/signup_form.html'
def get_context_data(self, **kwargs):
kwargs['user_type'] = 'student'
return super().get_context_data(**kwargs)
def form_valid(self, form):
user = form.save()
login(self.request, user)
return redirect('students:quiz_list')
@method_decorator([login_required, student_required], name='dispatch')
class StudentInterestsView(UpdateView):
model = Student
form_class = StudentInterestsForm
template_name = 'classroom/students/interests_form.html'
success_url = reverse_lazy('students:quiz_list')
def get_object(self):
return self.request.user.student
def form_valid(self, form):
messages.success(self.request, 'Interests updated with success!')
return super().form_valid(form)
@method_decorator([login_required, student_required], name='dispatch')
class QuizListView(ListView):
model = Quiz
ordering = ('name', )
context_object_name = 'quizzes'
template_name = 'classroom/students/quiz_list.html'
def get_queryset(self):
student = self.request.user.student
student_interests = student.interests.values_list('pk', flat=True)
taken_quizzes = student.quizzes.values_list('pk', flat=True)
queryset = Quiz.objects.filter(subject__in=student_interests) \
.exclude(pk__in=taken_quizzes) \
.annotate(questions_count=Count('questions')) \
.filter(questions_count__gt=0)
return queryset
@method_decorator([login_required, student_required], name='dispatch')
class TakenQuizListView(ListView):
model = TakenQuiz
context_object_name = 'taken_quizzes'
template_name = 'classroom/students/taken_quiz_list.html'
def get_queryset(self):
queryset = self.request.user.student.taken_quizzes \
.select_related('quiz', 'quiz__subject') \
.order_by('quiz__name')
return queryset
@login_required
@student_required
def take_quiz(request, pk):
quiz = get_object_or_404(Quiz, pk=pk)
student = request.user.student
if student.quizzes.filter(pk=pk).exists():
return render(request, 'students/taken_quiz.html')
total_questions = quiz.questions.count()
unanswered_questions = student.get_unanswered_questions(quiz)
total_unanswered_questions = unanswered_questions.count()
progress = 100 - round(((total_unanswered_questions - 1) / total_questions) * 100)
question = unanswered_questions.first()
if request.method == 'POST':
form = TakeQuizForm(question=question, data=request.POST)
if form.is_valid():
with transaction.atomic():
student_answer = form.save(commit=False)
student_answer.student = student
student_answer.save()
if student.get_unanswered_questions(quiz).exists():
return redirect('students:take_quiz', pk)
else:
correct_answers = student.quiz_answers.filter(answer__question__quiz=quiz, answer__is_correct=True).count()
score = round((correct_answers / total_questions) * 100.0, 2)
TakenQuiz.objects.create(student=student, quiz=quiz, score=score)
if score < 50.0:
messages.warning(request, 'Better luck next time! Your score for the quiz %s was %s.' % (quiz.name, score))
else:
messages.success(request, 'Congratulations! You completed the quiz %s with success! You scored %s points.' % (quiz.name, score))
return redirect('students:quiz_list')
else:
form = TakeQuizForm(question=question)
return render(request, 'classroom/students/take_quiz_form.html', {
'quiz': quiz,
'question': question,
'form': form,
'progress': progress
})
