**Course Title:** Mastering Django Framework: Building Scalable Web Applications **Section Title:** User Authentication and Authorization **Topic:** Creating user registration and login/logout functionality In this topic, we will explore how to create user registration and login/logout functionality in a Django application. We will cover the following topics: ### 1. Creating a User Registration Form To create a user registration form, we will use Django's built-in `UserCreationForm` class. This form will handle the creation of new users and will validate the input data. ```python # forms.py from django.contrib.auth.forms import UserCreationForm from django.contrib.auth.models import User class RegistrationForm(UserCreationForm): class Meta: model = User fields = ('username', 'email', 'password1', 'password2') ``` ### 2. Creating a View to Handle User Registration Next, we will create a view to handle the user registration form. We will use Django's built-in `FormView` class to handle the form submission. ```python # views.py from django.shortcuts import render, redirect from .forms import RegistrationForm from django.contrib.auth import login def register(request): if request.method == 'POST': form = RegistrationForm(request.POST) if form.is_valid(): user = form.save() login(request, user) return redirect('home') else: form = RegistrationForm() return render(request, 'register.html', {'form': form}) ``` ### 3. Creating a Login View To create a login view, we will use Django's built-in `LoginView` class. This view will handle the login form submission and will authenticate the user. ```python # views.py from django.contrib.auth.views import LoginView from django.urls import reverse_lazy class LoginView(LoginView): template_name = 'login.html' success_url = reverse_lazy('home') ``` ### 4. Creating a Logout View To create a logout view, we will use Django's built-in `LogoutView` class. This view will handle the logout request and will log out the user. ```python # views.py from django.contrib.auth.views import LogoutView class LogoutView(LogoutView): template_name = 'logout.html' ``` ### 5. Creating URLs for User Registration, Login and Logout Finally, we will create URLs for user registration, login, and logout. ```python # urls.py from django.urls import path from . import views urlpatterns = [ path('register/', views.register, name='register'), path('login/', views.LoginView.as_view(), name='login'), path('logout/', views.LogoutView.as_view(), name='logout'), ] ``` ### 6. Creating Templates for User Registration, Login, and Logout We will create templates for user registration, login, and logout. ```html <!-- register.html --> <form method="post"> {% csrf_token %} {{ form.as_p }} <button type="submit">Register</button> </form> ``` ```html <!-- login.html --> <form method="post"> {% csrf_token %} {{ form.as_p }} <button type="submit">Login</button> </form> ``` ```html <!-- logout.html --> <p>You have been logged out.</p> ``` ### Conclusion In this topic, we have covered how to create user registration and login/logout functionality in a Django application. We have used Django's built-in forms, views, and templates to handle user registration, login, and logout. ### Exercise Try to create a user registration and login/logout functionality in a Django application using the concepts learned in this topic. ### Leave a comment If you have any questions or need help with implementing user registration and login/logout functionality in a Django application, please leave a comment below. ### External Resources * Django documentation: [Authentication and Authorization](https://docs.djangoproject.com/en/4.1/topics/auth/) * Django documentation: [Forms](https://docs.djangoproject.com/en/4.1/topics/forms/) * Django documentation: [Views](https://docs.djangoproject.com/en/4.1/topics/http/views/) * Django documentation: [Templates](https://docs.djangoproject.com/en/4.1/topics/templates/) ### Next Topic In the next topic, we will cover "Understanding user permissions and group-based access control."