Django poll thing

djtut/mysite/polls/admin.py

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+from django.contrib import admin
+
+from .models import Question
+
+admin.site.register(Question)

djtut/mysite/polls/apps.py

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+from django.apps import AppConfig
+
+
+class PollsConfig(AppConfig):
+    name = "polls"

djtut/mysite/polls/migrations/0001_initial.py

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+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.29 on 2020-03-14 01:39
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        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)),
+            ],
+        ),
+        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.AddField(
+            model_name='choice',
+            name='question',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='polls.Question'),
+        ),
+    ]

djtut/mysite/polls/models.py

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+from django.db import models
+
+
+class Question(models.Model):
+    question_text = models.CharField(max_length=200)
+    pub_date = models.DateTimeField("date published")
+
+
+class Choice(models.Model):
+    question = models.ForeignKey(Question, on_delete=models.CASCADE)
+    choice_text = models.CharField(max_length=200)
+    votes = models.IntegerField(default=0)

djtut/mysite/polls/templates/polls/detail.html

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+<h1>{{ question.question_text }}</h1>
+
+{% if error_message %}<p><strong>{{ error_mmessage }}</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>

djtut/mysite/polls/templates/polls/index.html

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+{% 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 %}

djtut/mysite/polls/templates/polls/results.html

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+<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>

djtut/mysite/polls/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

djtut/mysite/polls/urls.py

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+from django.conf.urls import url
+
+from . import views
+
+app_name = "polls"
+urlpatterns = [
+    url("^$", views.index, name="index"),
+    url("^(?P<question_id>[0-9]+)/$", views.detail, name="detail"),
+    url("^(?P<question_id>[0-9]+)/results/$", views.results, name="results"),
+    url("^(?P<question_id>[0-9]+)/vote/$", views.vote, name="vote"),
+]

djtut/mysite/polls/views.py

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+from django.shortcuts import render, get_object_or_404
+from django.http import HttpResponseRedirect, HttpResponse
+from django.urls import reverse
+
+from .models import 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)
+
+
+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):
+    question = get_object_or_404(Question, pk=question_id)
+    return render(request, "polls/results.html", {"question": question})
+
+
+def vote(request, 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):
+        return render(
+            request,
+            "polls/vote.html",
+            {"question": question, "error_message": "You didn't select a choice."},
+        )
+    else:
+        selected_choice.votes += 1
+        selected_choice.save()
+        return HttpResponseRedirect(reverse("polls:results", args=(question.id,)))