add ch04 snippet files

Snippets/ch04/01.01/account/admin_00.py

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+from django.contrib import admin
+
+# Register your models here.

Snippets/ch04/01.01/account/models_00.py

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+from django.db import models
+
+# Create your models here.

Snippets/ch04/01.01/account/views_00.py

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+from django.shortcuts import render
+
+# Create your views here.

Snippets/ch04/01.01/bookmarks/settings_00.py

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+"""
+Django settings for bookmarks project.
+
+Generated by 'django-admin startproject' using Django 4.0.6.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.0/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/4.0/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'django-insecure-afotl3_(pgs@jg&*fx-ua105v3%s9+$ix63u_yfi@8zz0%pjww'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'bookmarks.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'bookmarks.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/4.0/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': BASE_DIR / 'db.sqlite3',
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/4.0/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/4.0/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/4.0/howto/static-files/
+
+STATIC_URL = 'static/'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

Snippets/ch04/01.01/bookmarks/settings_01.py

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+"""
+Django settings for bookmarks project.
+
+Generated by 'django-admin startproject' using Django 4.0.6.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.0/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/4.0/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'django-insecure-afotl3_(pgs@jg&*fx-ua105v3%s9+$ix63u_yfi@8zz0%pjww'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'account.apps.AccountConfig',                                              # new
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'bookmarks.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'bookmarks.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/4.0/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': BASE_DIR / 'db.sqlite3',
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/4.0/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/4.0/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/4.0/howto/static-files/
+
+STATIC_URL = 'static/'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

Snippets/ch04/01.01/bookmarks/urls_00.py

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+"""bookmarks URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/4.0/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+]

Snippets/ch04/02.01/account/forms_01.py

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+from django import forms
+
+class LoginForm(forms.Form):
+    username = forms.CharField()
+    password = forms.CharField(widget=forms.PasswordInput)

Snippets/ch04/02.01/account/templates/base_01.html

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+{% load static %}
+<!DOCTYPE html>
+<html>
+<head>
+  <title>{% block title %}{% endblock %}</title>
+  <link href="{% static "css/base.css" %}" rel="stylesheet">
+</head>
+<body>
+  <div id="header">
+    <span class="logo">Bookmarks</span>
+  </div>
+  <div id="content">
+    {% block content %}
+    {% endblock %}
+  </div>
+</body>

Snippets/ch04/02.01/account/views_01.py

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+from django.http import HttpResponse                                           # new
+from django.shortcuts import render
+from django.contrib.auth import authenticate, login                            # new
+from .forms import LoginForm                                                   # new
+
+# new block
+def user_login(request):
+    if request.method == 'POST':
+        form = LoginForm(request.POST)
+        if form.is_valid():
+            cd = form.cleaned_data
+            user = authenticate(request,
+                                username=cd['username'],
+                                password=cd['password'])
+            if user is not None:
+                if user.is_active:
+                    login(request, user)
+                    return HttpResponse('Authenticated '\
+                                        'successfully')
+                else:
+                    return HttpResponse('Disabled account')
+            else:
+                return HttpResponse('Invalid login')
+    else:
+        form = LoginForm()
+    return render(request, 'account/login.html', {'form': form})
+#

Snippets/ch04/02.01/bookmarks/urls_01.py

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+"""bookmarks URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/4.0/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path, include                                          # edited
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+    path('account/', include('account.urls')),                                 # new
+]

Snippets/ch04/02.03/account/templates/account/dashboard_01.html

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+{% extends "base.html" %}
+
+{% block title %}Dashboard{% endblock %}
+
+{% block content %}
+  <h1>Dashboard</h1>
+  <p>Welcome to your dashboard.</p>
+{% endblock %}

Snippets/ch04/02.03/account/templates/registration/login_01.html

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+{% extends "base.html" %}
+
+{% block title %}Log-in{% endblock %}
+
+{% block content %}
+  <h1>Log-in</h1>
+  {% if form.errors %}
+    <p>
+      Your username and password didn't match.
+      Please try again.
+    </p>
+  {% else %}
+    <p>Please, use the following form to log-in:</p>
+  {% endif %}
+  <div class="login-form">
+    <form action="{% url 'login' %}" method="post">
+      {{ form.as_p }}
+      {% csrf_token %}
+      <input type="hidden" name="next" value="{{ next }}" />
+      <p><input type="submit" value="Log-in"></p>
+    </form>
+  </div>
+{% endblock %}