126 lines
3.9 KiB
Python
126 lines
3.9 KiB
Python
from django.shortcuts import get_object_or_404, render
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# Create your views here.
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from django.http import HttpResponse, HttpResponseRedirect
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from django.template import loader
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from django.urls import reverse
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from django.views import generic
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from .models import Choice, Question
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from django.http import Http404
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from django.utils import timezone
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## simple index
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#def index(request):
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# return HttpResponse("Hello, world. You're at the polls index.")
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## meaningful index
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#def index(request):
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# latest_question_list = Question.objects.order_by('-pub_date')[:5]
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# output = ', '.join([q.question_text for q in latest_question_list])
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# return HttpResponse(output)
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## meaningful and templated index
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#def index(request):
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# latest_question_list = Question.objects.order_by('-pub_date')[:5]
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# template = loader.get_template('polls/index.html')
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# context = {
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# 'latest_question_list': latest_question_list,
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# }
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# return HttpResponse(template.render(context, request))
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## meaningful, templated and easy to write index
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## and then we no longer need to import loader and HttpResponse
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#def index(request):
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# latest_question_list = Question.objects.order_by('-pub_date')[:5]
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# context = {
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# 'latest_question_list': latest_question_list,
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# }
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# return render(request, 'polls/index.html', context)
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class IndexView(generic.ListView):
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template_name = 'polls/index.html'
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context_object_name = 'latest_question_list'
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## has bug
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# def get_queryset(self):
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# """Return the last five published questions."""
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# return Question.objects.order_by('-pub_date')[:5]
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# refactor
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def get_queryset(self):
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"""
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Return the last five published questions (not including those set to be
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published in the future).
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"""
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return Question.objects.filter(
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pub_date__lte=timezone.now()
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).order_by('-pub_date')[:5]
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## simple detail
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#def detail(request, question_id):
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# return HttpResponse("You're looking at question %s." % question_id)
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## meaningful detail
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#def detail(request, question_id):
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# try:
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# question = Question.objects.get(pk=question_id)
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# except Question.DoesNotExist:
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# raise Http404("Question does not exist")
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# return render(request, 'polls/detail.html', {'question': question})
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## meaningful and easy to write detail
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#def detail(request, question_id):
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# question = get_object_or_404(Question, pk=question_id)
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# return render(request, 'polls/detail.html', {'question': question})
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## refactor detail view
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class DetailView(generic.DetailView):
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model = Question
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template_name = 'polls/detail.html'
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def get_queryset(self):
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"""
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Excludes any questions that aren't published yet.
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"""
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return Question.objects.filter(pub_date__lte=timezone.now())
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#def results(request, question_id):
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# response = "You're looking at the results of question %s."
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# return HttpResponse(response % question_id)
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# # real implementation of results
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#def results(request, question_id):
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# question = get_object_or_404(Question, pk=question_id)
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# return render(request, 'polls/results.html', {'question': question})
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# # refactor results view
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class ResultsView(generic.DetailView):
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model = Question
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template_name = 'polls/results.html'
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#def vote(request, question_id):
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# return HttpResponse("You're voting on question %s." % question_id)
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# #real implementation of vote
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def vote (request, question_id):
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question = get_object_or_404(Question, pk=question_id)
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try:
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selected_choice = question.choice_set.get(pk=request.POST['choice'])
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except (KeyError, Choice.DoesNotExist):
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# Redisplay the question voting form.
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return render(request, 'polls/detail.html', {
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'question': question,
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'error_message': "You didn't select a choice.",
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})
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else:
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selected_choice.votes += 1
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selected_choice.save()
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# Always return an HttpResponseRedirect after successfully dealing
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# with POST data. This prevents data from being posted twice if a
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# user hits the Back button
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return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))
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