48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
from django.db.models import F
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from django.http import HttpResponseRedirect
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from django.shortcuts import get_object_or_404, render
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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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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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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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class DetailView(generic.DetailView):
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model = Question
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template_name = "polls/detail.html"
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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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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(
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request,
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"polls/detail.html",
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{
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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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)
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else:
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selected_choice.votes = F("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,))) |