Django Views and URLs

Introduction

Django views handle HTTP requests and return responses. URLs map routes to views.

Function-Based Views

from django.http import HttpResponse, JsonResponse
from django.shortcuts import render, get_object_or_404
from .models import Book

def book_list(request):
    books = Book.objects.all()
    return render(request, "books/list.html", {"books": books})

def book_detail(request, book_id):
    book = get_object_or_404(Book, id=book_id)
    return render(request, "books/detail.html", {"book": book})

Class-Based Views

from django.views.generic import ListView, DetailView, CreateView
from .models import Book

class BookListView(ListView):
    model = Book
    template_name = "books/list.html"
    context_object_name = "books"

class BookDetailView(DetailView):
    model = Book
    template_name = "books/detail.html"

class BookCreateView(CreateView):
    model = Book
    fields = ["title", "author", "price"]
    success_url = "/books/"

URL Configuration

# urls.py
from django.urls import path
from . import views

urlpatterns = [
    path("books/", views.book_list, name="book_list"),
    path("books/<int:book_id>/", views.book_detail, name="book_detail"),
    path("books/create/", views.BookCreateView.as_view(), name="book_create"),
]

Practice Problems

1. Create CRUD views for a model
2. Use class-based generic views
3. Implement detail views with URL parameters
4. Add template context data
5. Handle form submission in views