from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse, Http404
from polls.models import Question

# Create your views here.

def index(request):
    latest_question_list = Question.objects.order_by('pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/index.html', context)

def detail(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    return render(request, 'polls/detail.html', {'question': question})

def results(request, question_id):
    response = "You're looking at the results of question %s."
    return HttpResponse(response % question_id)

def vote(request, question_id):
    return HttpResponse("You're voting on question %s." % question_id)

from django.shortcuts import render, get_object_or_404
from django.http import HttpResponseRedirect, HttpResponse
from django.core.urlresolvers import reverse

from polls.models import Choice, Question

# Create your views here.

def index(request):
    latest_question_list = Question.objects.order_by('pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/index.html', context)

def detail(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    return render(request, 'polls/detail.html', {'question': question})

def results(request, question_id):
    response = "You're looking at the results of question %s."
    return HttpResponse(response % question_id)

def vote(request, question_id):
    p = get_object_or_404(Question, pk=question_id)
    try:
        selected_choice = p.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the question voting form.
        return render(request, 'polls/detail.html', {
            'question': p,
            '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=(p.id,)))
Update the view for the voting
Update the view for the voting

  from django.shortcuts import render, get_object_or_404
- from django.http import HttpResponse, Http404
+ from django.http import HttpResponseRedirect, HttpResponse
+ from django.core.urlresolvers import reverse
+ 
- from polls.models import Question
+ from polls.models import Choice, Question
  
  # Create your views here.
  
  def index(request):
      latest_question_list = Question.objects.order_by('pub_date')[:5]
      context = {'latest_question_list': latest_question_list}
      return render(request, 'polls/index.html', context)
  
  def detail(request, question_id):
      question = get_object_or_404(Question, pk=question_id)
      return render(request, 'polls/detail.html', {'question': question})
  
  def results(request, question_id):
      response = "You're looking at the results of question %s."
      return HttpResponse(response % question_id)
  
  def vote(request, question_id):
-     return HttpResponse("You're voting on question %s." % question_id)
- 
+     p = get_object_or_404(Question, pk=question_id)
+     try:
+         selected_choice = p.choice_set.get(pk=request.POST['choice'])
+     except (KeyError, Choice.DoesNotExist):
+         # Redisplay the question voting form.
+         return render(request, 'polls/detail.html', {
+             'question': p,
+             '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=(p.id,)))
Update the view for the voting
## Code Before:
from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse, Http404
from polls.models import Question

# Create your views here.

def index(request):
    latest_question_list = Question.objects.order_by('pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/index.html', context)

def detail(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    return render(request, 'polls/detail.html', {'question': question})

def results(request, question_id):
    response = "You're looking at the results of question %s."
    return HttpResponse(response % question_id)

def vote(request, question_id):
    return HttpResponse("You're voting on question %s." % question_id)

## Instruction:
Update the view for the voting
## Code After:
from django.shortcuts import render, get_object_or_404
from django.http import HttpResponseRedirect, HttpResponse
from django.core.urlresolvers import reverse

from polls.models import Choice, Question

# Create your views here.

def index(request):
    latest_question_list = Question.objects.order_by('pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/index.html', context)

def detail(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    return render(request, 'polls/detail.html', {'question': question})

def results(request, question_id):
    response = "You're looking at the results of question %s."
    return HttpResponse(response % question_id)

def vote(request, question_id):
    p = get_object_or_404(Question, pk=question_id)
    try:
        selected_choice = p.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        # Redisplay the question voting form.
        return render(request, 'polls/detail.html', {
            'question': p,
            '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=(p.id,)))