from django.shortcuts import get_object_or_404, render
from django.http import HttpResponseRedirect, HttpResponse
from django.http import HttpResponse
from django.urls import reverse
from django.views.generic import ListView,DetailView
from .models import Poll, Choice

class IndexView(ListView):
    context_object_name = 'latest_question_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Poll.objects.order_by('-pub_date')[:5]


class DetailView(DetailView):
    model = Poll

class ResultsView(DetailView):
    model = Poll



def vote(request, question_id):
    question = get_object_or_404(Poll, pk=question_id)
    try:
        selected_choice = question.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the question voting form.
        return render(request, 'polls/detail.html', {
            'question': question,
            'error_message': "You didn't select a choice.",
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        # Always return an HttpResponseRedirect after successfully dealing
        # with POST data. This prevents data from being posted twice if a
        # user hits the Back button.
        return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))

from django.shortcuts import get_object_or_404, render
from django.http import HttpResponseRedirect, HttpResponse
from django.http import HttpResponse
from django.urls import reverse
from django.views.generic import ListView,DetailView
from .models import Poll, Choice

class IndexView(ListView):
    context_object_name = 'latest_question_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Poll.objects.order_by('-pub_date')[:5]


class DetailView(DetailView):
    model = Poll

class ResultsView(DetailView):
    model = Poll



def vote(request, question_id):
    question = get_object_or_404(Poll, pk=question_id)
    try:
        selected_choice = question.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the question voting form.
        return render(request, 'polls/detail.html', {
            'question': question,
            'error_message': "You didn't select a choice.",
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        # Always return an HttpResponseRedirect after successfully dealing
        # with POST data. This prevents data from being posted twice if a
        # user hits the Back button.
        return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))

Return the last five published questions. # Redisplay the question voting form. # Always return an HttpResponseRedirect after successfully dealing # with POST data. This prevents data from being posted twice if a # user hits the Back button.