Add listing model

auctions/admin.py

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+from django.contrib import admin
+
+from .models import User, Listing
+
+admin.site.register(User)
+admin.site.register(Listing)

auctions/apps.py

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+from django.apps import AppConfig
+
+
+class AuctionsConfig(AppConfig):
+    name = 'auctions'

auctions/migrations/0001_initial.py

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+# Generated by Django 4.1.5 on 2023-01-31 19:09
+
+from django.conf import settings
+import django.contrib.auth.models
+import django.contrib.auth.validators
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('auth', '0012_alter_user_first_name_max_length'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='User',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('password', models.CharField(max_length=128, verbose_name='password')),
+                ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
+                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
+                ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')),
+                ('first_name', models.CharField(blank=True, max_length=150, verbose_name='first name')),
+                ('last_name', models.CharField(blank=True, max_length=150, verbose_name='last name')),
+                ('email', models.EmailField(blank=True, max_length=254, verbose_name='email address')),
+                ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
+                ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
+                ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
+                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.group', verbose_name='groups')),
+                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.permission', verbose_name='user permissions')),
+            ],
+            options={
+                'verbose_name': 'user',
+                'verbose_name_plural': 'users',
+                'abstract': False,
+            },
+            managers=[
+                ('objects', django.contrib.auth.models.UserManager()),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Listing',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=64)),
+                ('description', models.CharField(max_length=256)),
+                ('seller', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='listings', to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]

auctions/models.py

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+from django.contrib.auth.models import AbstractUser
+from django.db import models
+
+
+class User(AbstractUser):
+    pass
+
+
+class Listing(models.Model):
+    name = models.CharField(max_length=64)
+    description = models.CharField(max_length=256)
+    seller = models.ForeignKey(User, on_delete=models.CASCADE, related_name="listings")
+
+    def __str__(self):
+        return f"{self.name}, {self.description}"

auctions/static/auctions/styles.css

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+body {
+    padding: 10px;
+}

auctions/templates/auctions/index.html

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+{% extends "auctions/layout.html" %}
+
+{% block body %}
+    <h2>Active Listings</h2>
+
+     <ul>
+        {% for listing in listings %}
+            <li>Listing {{ listing.id }}: {{ listing.name }} - {{ listing.description }}, made by {{ listing.seller }}</li>
+        {% endfor %}
+    </ul>
+{% endblock %}

auctions/templates/auctions/layout.html

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+{% load static %}
+
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <title>{% block title %}Auctions{% endblock %}</title>
+        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
+        <link href="{% static 'auctions/styles.css' %}" rel="stylesheet">
+    </head>
+    <body>
+        <h1>Auctions</h1>
+        <div>
+            {% if user.is_authenticated %}
+                Signed in as <strong>{{ user.username }}</strong>.
+            {% else %}
+                Not signed in.
+            {% endif %}
+        </div>
+        <ul class="nav">
+            <li class="nav-item">
+                <a class="nav-link" href="{% url 'index' %}">Active Listings</a>
+            </li>
+            {% if user.is_authenticated %}
+                <li class="nav-item">
+                    <a class="nav-link" href="{% url 'logout' %}">Log Out</a>
+                </li>
+            {% else %}
+                <li class="nav-item">
+                    <a class="nav-link" href="{% url 'login' %}">Log In</a>
+                </li>
+                <li class="nav-item">
+                    <a class="nav-link" href="{% url 'register' %}">Register</a>
+                </li>
+            {% endif %}
+        </ul>
+        <hr>
+        {% block body %}
+        {% endblock %}
+    </body>
+</html>

auctions/templates/auctions/login.html

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+{% extends "auctions/layout.html" %}
+
+{% block body %}
+
+    <h2>Login</h2>
+
+    {% if message %}
+        <div>{{ message }}</div>
+    {% endif %}
+
+    <form action="{% url 'login' %}" method="post">
+        {% csrf_token %}
+        <div class="form-group">
+            <input autofocus class="form-control" type="text" name="username" placeholder="Username">
+        </div>
+        <div class="form-group">
+            <input class="form-control" type="password" name="password" placeholder="Password">
+        </div>
+        <input class="btn btn-primary" type="submit" value="Login">
+    </form>
+
+    Don't have an account? <a href="{% url 'register' %}">Register here.</a>
+
+{% endblock %}

auctions/templates/auctions/register.html

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+{% extends "auctions/layout.html" %}
+
+{% block body %}
+
+    <h2>Register</h2>
+
+    {% if message %}
+        <div>{{ message }}</div>
+    {% endif %}
+
+    <form action="{% url 'register' %}" method="post">
+        {% csrf_token %}
+        <div class="form-group">
+            <input class="form-control" autofocus type="text" name="username" placeholder="Username">
+        </div>
+        <div class="form-group">
+            <input class="form-control" type="email" name="email" placeholder="Email Address">
+        </div>
+        <div class="form-group">
+            <input class="form-control" type="password" name="password" placeholder="Password">
+        </div>
+        <div class="form-group">
+            <input class="form-control" type="password" name="confirmation" placeholder="Confirm Password">
+        </div>
+        <input class="btn btn-primary" type="submit" value="Register">
+    </form>
+
+    Already have an account? <a href="{% url 'login' %}">Log In here.</a>
+
+{% endblock %}

auctions/tests.py

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

auctions/urls.py

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+from django.urls import path
+
+from . import views
+
+urlpatterns = [
+    path("", views.index, name="index"),
+    path("login", views.login_view, name="login"),
+    path("logout", views.logout_view, name="logout"),
+    path("register", views.register, name="register")
+]

auctions/views.py

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+from django.contrib.auth import authenticate, login, logout
+from django.db import IntegrityError
+from django.http import HttpResponse, HttpResponseRedirect
+from django.shortcuts import render
+from django.urls import reverse
+
+from .models import User, Listing
+
+
+def index(request):
+    return render(request, "auctions/index.html", {
+        "listings": Listing.objects.all()
+    })
+
+
+def login_view(request):
+    if request.method == "POST":
+
+        # Attempt to sign user in
+        username = request.POST["username"]
+        password = request.POST["password"]
+        user = authenticate(request, username=username, password=password)
+
+        # Check if authentication successful
+        if user is not None:
+            login(request, user)
+            return HttpResponseRedirect(reverse("index"))
+        else:
+            return render(request, "auctions/login.html", {
+                "message": "Invalid username and/or password."
+            })
+    else:
+        return render(request, "auctions/login.html")
+
+
+def logout_view(request):
+    logout(request)
+    return HttpResponseRedirect(reverse("index"))
+
+
+def register(request):
+    if request.method == "POST":
+        username = request.POST["username"]
+        email = request.POST["email"]
+
+        # Ensure password matches confirmation
+        password = request.POST["password"]
+        confirmation = request.POST["confirmation"]
+        if password != confirmation:
+            return render(request, "auctions/register.html", {
+                "message": "Passwords must match."
+            })
+
+        # Attempt to create new user
+        try:
+            user = User.objects.create_user(username, email, password)
+            user.save()
+        except IntegrityError:
+            return render(request, "auctions/register.html", {
+                "message": "Username already taken."
+            })
+        login(request, user)
+        return HttpResponseRedirect(reverse("index"))
+    else:
+        return render(request, "auctions/register.html")

commerce/asgi.py

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+"""
+ASGI config for commerce project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.0/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'commerce.settings')
+
+application = get_asgi_application()