[Django #5] Tutorial 4

kjg/django/mysite/mysite/settings.py

@@ -25,8 +25,8 @@ SECRET_KEY = '2kbmvs@pcbxn)kt#p9$)45=h#i8_b7^^l&l57mbe4%e=+k91-d'
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True
 
-ALLOWED_HOSTS = [ "[2a0a:e5c1:151::12]" ]
-
+ALLOWED_HOSTS = [ "[2a0a:e5c1:114::12]", "127.0.0.1", "[2a0a:e5c1:151::12]", "testjg.django.lab.ungleich.ch", "[2a0a:e5c1:114::17]" ]
+#ALLOWED_HOSTS = []
 
 # Application definition
 

kjg/django/mysite/mysite/urls.py

@@ -14,8 +14,11 @@ Including another URLconf
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
 from django.contrib import admin
-from django.urls import path
+from django.urls import include, path
+
 
 urlpatterns = [
+    path('polls/', include('polls.urls')),
     path('admin/', admin.site.urls),
 ]
+

kjg/django/mysite/polls/admin.py

@@ -1,5 +1,6 @@
 from django.contrib import admin
 
-from .models import Question
+from .models import Question, Choice
 
 admin.site.register(Question)
+admin.site.register(Choice)

kjg/django/mysite/polls/migrations/0001_initial.py

@@ -0,0 +1,32 @@
+# Generated by Django 3.0.8 on 2020-07-06 15:51
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Question',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('question_text', models.CharField(max_length=200)),
+                ('pub_date', models.DateTimeField(verbose_name='date published')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Choice',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('choice_text', models.CharField(max_length=200)),
+                ('votes', models.IntegerField(default=0)),
+                ('question', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='polls.Question')),
+            ],
+        ),
+    ]

kjg/django/mysite/polls/templates/polls/detail.html

@@ -0,0 +1,12 @@
+<h1>{{ question.question_text }}</h1>
+
+{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
+
+<form action="{% url 'polls:vote' question.id %}" method="post">
+{% csrf_token %}
+{% 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 %}
+<input type="submit" value="Vote">
+</form>

kjg/django/mysite/polls/templates/polls/index.html

@@ -0,0 +1,9 @@
+{% if latest_question_list %}
+    <ul>
+    {% for question in latest_question_list %}
+        <li><a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a></li>
+    {% endfor %}
+    </ul>
+{% else %}
+    <p>No polls are available.</p>
+{% endif %}

kjg/django/mysite/polls/templates/polls/results.html

@@ -0,0 +1,9 @@
+<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 'polls:detail' question.id %}">Vote again?</a>

kjg/django/mysite/polls/urls.py

@@ -2,6 +2,10 @@ from django.urls import path
 
 from . import views
 
+app_name = 'polls'
 urlpatterns = [
-    path('', views.index, name='index'),
+    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'),
 ]

kjg/django/mysite/polls/views.py

@@ -1,3 +1,59 @@
-from django.shortcuts import render
+from django.http import HttpResponse, HttpResponseRedirect
+#from django.http import Http404
+from django.template import loader
+from django.shortcuts import get_object_or_404, render
+from django.urls import reverse
+from django.views import generic
 
-# Create your views here.
+from .models import Choice, Question
+
+
+#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)
+class IndexView(generic.ListView):
+    template_name = 'polls/index.html'
+    context_object_name = 'latest_question_list'
+
+    def get_queryset(self):
+        """Return the last five published questions."""
+        return Question.objects.order_by('-pub_date')[:5]
+
+#def detail(request, question_id):
+#    #return HttpResponse("You're looking at question %s." % question_id)
+#    question = get_object_or_404(Question, pk=question_id)
+#    return render(request, 'polls/detail.html', {'question': question})
+class DetailView(generic.DetailView):
+    model = Question
+    template_name = 'polls/detail.html'
+
+
+#def results(request, question_id):
+#    #response = "You're looking at the results of question %s."
+#    #return HttpResponse(response % question_id)
+#    question = get_object_or_404(Question, pk=question_id)
+#    return render(request, 'polls/results.html', {'question': question})
+class ResultsView(generic.DetailView):
+    model = Question
+    template_name = 'polls/results.html'
+
+
+def vote(request, question_id):
+    #return HttpResponse("You're voting on question %s." % question_id)
+    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, '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,)))