mysite/
├── mysite/
│   ├── settings.py
│   └── urls.py
└── books/
    ├── migrations/
    ├── templates/
    │   └── books/
    │       ├── book_list.html
    │       ├── book_detail.html
    │       ├── book_form.html
    │       └── book_confirm_delete.html
    ├── models.py
    ├── views.py
    └── urls.py

from django.views.generic import ListView

class BookListView(ListView):
    model               = Book
    template_name       = 'books/book_list.html'   # default
    context_object_name = 'books'                   # default: object_list
    paginate_by         = 10                        # optional pagination
    ordering            = ['-pub_date']             # newest first

    def get_queryset(self):
        # override to filter — e.g., search by query param
        qs = super().get_queryset()
        q  = self.request.GET.get('q')
        if q:
            qs = qs.filter(title__icontains=q)
        return qs

from django.views.generic import DetailView

class BookDetailView(DetailView):
    model               = Book
    template_name       = 'books/book_detail.html'  # default
    context_object_name = 'book'                     # default: object

    def get_context_data(self, **kwargs):
        # add extra context variables to the template
        ctx = super().get_context_data(**kwargs)
        ctx['related'] = Book.objects.filter(
            author=self.object.author
        ).exclude(pk=self.object.pk)
        return ctx

from django.views.generic.edit import CreateView
from django.urls import reverse_lazy

class BookCreateView(CreateView):
    model         = Book
    fields        = ['title', 'author', 'pages', 'pub_date']
    # OR: form_class = BookModelForm   (to use a custom ModelForm)

    def form_valid(self, form):
        # hook: runs after valid submission, before redirect
        # e.g., attach logged-in user: form.instance.owner = self.request.user
        return super().form_valid(form)

from django.views.generic.edit import UpdateView

class BookUpdateView(UpdateView):
    model         = Book
    fields        = ['title', 'author', 'pages', 'pub_date']
    template_name = 'books/book_form.html'  # same template as Create!
    # success_url defaults to get_absolute_url()

from django.views.generic.edit import DeleteView
from django.urls import reverse_lazy

class BookDeleteView(DeleteView):
    model       = Book
    success_url = reverse_lazy('book-list')
    # GET  → renders book_confirm_delete.html with {{ object }}
    # POST → deletes and redirects to success_url

from django.views.generic       import ListView, DetailView
from django.views.generic.edit  import CreateView, UpdateView, DeleteView
from django.urls                 import reverse_lazy
from .models                     import Book

class BookListView(ListView):
    model               = Book
    context_object_name = 'books'
    ordering            = ['-pub_date']

class BookDetailView(DetailView):
    model               = Book
    context_object_name = 'book'

class BookCreateView(CreateView):
    model  = Book
    fields = ['title', 'author', 'pages', 'pub_date']

class BookUpdateView(UpdateView):
    model  = Book
    fields = ['title', 'author', 'pages', 'pub_date']

class BookDeleteView(DeleteView):
    model       = Book
    success_url = reverse_lazy('book-list')

<h1>All Books</h1>
<a href="{% url 'book-create' %}">+ New Book</a>

<ul>
{% for book in books %}
  <li>
    <a href="{{ book.get_absolute_url }}">{{ book.title }}</a>
    — {{ book.author }}
    <a href="{% url 'book-update' book.pk %}">Edit</a>
    <a href="{% url 'book-delete' book.pk %}">Delete</a>
  </li>
{% empty %}
  <li>No books yet.</li>
{% endfor %}
</ul>

<h1>{{ book.title }}</h1>
<p>Author: {{ book.author }}</p>
<p>Pages: {{ book.pages }}</p>
<p>Published: {{ book.pub_date }}</p>

<a href="{% url 'book-update' book.pk %}">Edit</a>
<a href="{% url 'book-delete' book.pk %}">Delete</a>
<a href="{% url 'book-list' %}">← Back</a>

<h1>{% if object %}Edit{% else %}New{% endif %} Book</h1>

<form method="post">
  {% csrf_token %}
  {{ form.as_p }}
  <button type="submit">Save</button>
</form>

<a href="{% url 'book-list' %}">Cancel</a>

<h1>Delete "{{ object.title }}"?</h1>
<p>This action cannot be undone.</p>

<form method="post">
  {% csrf_token %}
  <button type="submit">Yes, Delete</button>
</form>

<a href="{{ object.get_absolute_url }}">Cancel</a>

from django.urls import path
from .views import (
    BookListView, BookDetailView,
    BookCreateView, BookUpdateView, BookDeleteView
)

urlpatterns = [
    path('',                  BookListView.as_view(),   name='book-list'),
    path('<int:pk>/',         BookDetailView.as_view(), name='book-detail'),
    path('new/',              BookCreateView.as_view(), name='book-create'),
    path('<int:pk>/edit/',   BookUpdateView.as_view(), name='book-update'),
    path('<int:pk>/delete/', BookDeleteView.as_view(), name='book-delete'),
]

from django.contrib.auth.mixins import LoginRequiredMixin

class BookCreateView(LoginRequiredMixin, CreateView):
    model  = Book
    fields = ['title', 'author', 'pages', 'pub_date']

class BookUpdateView(LoginRequiredMixin, UpdateView):
    model  = Book
    fields = ['title', 'author', 'pages', 'pub_date']

class BookDeleteView(LoginRequiredMixin, DeleteView):
    model       = Book
    success_url = reverse_lazy('book-list')