第4课代码

第4课代码

mysite/kaoshi/templates/kaoshi/detail.html

-<h1>{{ question.question_text }}</h1>
-<ul>
-{% for choice in question.choice_set.all %}
-    <li>{{ choice.choice_text }}</li>
-{% endfor %}
-</ul>
\ No newline at end of file
+<form action="{% url 'kaoshi:vote' question.id %}" method="post">
+{% csrf_token %}
+<fieldset>
+    <legend><h1>{{ question.question_text }}</h1></legend>
+    {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
+    {% for choice in question.choice_set.all %}
+        <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}">
+        <label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label><br>
+    {% endfor %}
+</fieldset>
+<input type="submit" value="Vote">
+</form>
\ No newline at end of file

mysite/kaoshi/templates/kaoshi/results.html

+<h1>{{ question.question_text }}</h1>
+
+<ul>
+{% for choice in question.choice_set.all %}
+    <li>{{ choice.choice_text }} -- {{ choice.votes }} vote{{ choice.votes|pluralize }}</li>
+{% endfor %}
+</ul>
+
+<a href="{% url 'kaoshi:detail' question.id %}">Vote again?</a>
\ No newline at end of file

mysite/kaoshi/urls.py

@@ -4,8 +4,8 @@ from . import views
 
 app_name = 'kaoshi'
 urlpatterns = [
-    path('', views.index, name='index'),
-    path('<int:question_id>/', views.detail, name='detail'),
-    path('<int:question_id>/results/', views.results, name='results'),
+    path('', views.IndexView.as_view(), name='index'),
+    path('<int:pk>/', views.DetailView.as_view(), name='detail'),
+    path('<int:pk>/results/', views.ResultsView.as_view(), name='results'),
     path('<int:question_id>/vote/', views.vote, name='vote'),
 ]
\ No newline at end of file

mysite/kaoshi/views.py

-from django.http import HttpResponse
-from django.http import Http404
+from django.http import HttpResponse, HttpResponseRedirect
 from django.shortcuts import get_object_or_404, render
-from .models import Question
+from django.urls import reverse
+from django.views import generic
+from .models import Choice, Question
+from django.utils import timezone
 
-def index(request):
-    latest_question_list = Question.objects.order_by('-pub_date')[:5]
-    context = {'latest_question_list': latest_question_list}
-    return render(request, 'kaoshi/index.html', context)
+class IndexView(generic.ListView):
+    template_name = 'kaoshi/index.html'
+    context_object_name = 'latest_question_list'
 
-def detail(request, question_id):
-    question = get_object_or_404(Question, pk=question_id)
-    return render(request, 'kaoshi/detail.html', {'question': question})
+    def get_queryset(self):
+        """
+        Return the last five published questions (not including those set to be
+        published in the future).
+        """
+        return Question.objects.filter(
+            pub_date__lte=timezone.now()
+        ).order_by('-pub_date')[:5]
+
+
+class DetailView(generic.DetailView):
+    model = Question
+    template_name = 'kaoshi/detail.html'
 
-def results(request, question_id):
-    response = "You're looking at the results of question %s."
-    return HttpResponse(response % question_id)
+
+class ResultsView(generic.DetailView):
+    model = Question
+    template_name = 'kaoshi/results.html'
 
 def vote(request, question_id):
-    return HttpResponse("You're voting on question %s." % question_id)
\ No newline at end of file
+    question = get_object_or_404(Question, 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, 'kaoshi/detail.html', {
+            'question': question,
+            'error_message': "You didn't select a choice.",
+        })
+    else:
+        selected_choice.votes += 1
+        selected_choice.save()
+        return HttpResponseRedirect(reverse('kaoshi:results', args=(question.id,)))
\ No newline at end of file