In this Django Rest Framework tutorial, you will learn how to set up an HTTP endpoint and create model objects. This will allow you to use the RESTful API to get information from the database. You will also learn about the GET() method and how to create a JSON serialized object.
AuthenticationFailed exception
When a user tries to access a website, the Django REST Framework may throw an AuthenticationFailed exception. This error occurs when the user fails to enter the proper authentication information. In this case, the user will receive an HTTP 403 Forbidden response. For more information, you can refer to the rest_framework. Authentication module’s official documentation.
You can solve this error by implementing a custom exception handler. This will allow you to custom-tailor the responses to API errors. You must create a handler function that only takes a single argument and returns a Response object. The handler function must return None if the exception cannot be handled. Otherwise, the handler will raise the AuthenticationFailed exception and return a standard HTTP 500’server error response.
Model serializer
Serializers are classes that convert complex model objects and querysets to Python data types. They can convert data from XML and JSON formats and also perform deserialization. Model serializers work similarly to Django forms. Model serializers use a serializer class that maps to a Django model.
Model serializers have two main methods: select_related and prefetch_related. The first is used to access models, and the second one to retrieve them. This method automatically attaches an id attribute to your models. The second output is a single object with a form. When modifying the current object, you can press PUT to change its information. You can also click delete to delete the object.
Class based views
A class-based view is a component of a Django application. This view implements a model that stores information about a specific object. The view also has methods for deleting and selecting objects. The APIView class is derived from Django’s View class and is the base class for all views in the Django REST Framework.
A class-based view can be extended by creating a subclass of the view. A decorator implements a method in the view that processes requests in the order they are passed to it. A class-based view can contain a single or multiple decorators.
GET() method
A GET() method is a standard HTTP request method. It returns a model object in the form of a JSON serialized object. HTTP also defines HTTP methods, such as PUT and DELETE. A REST API uses these methods to make data available and accessible.
DRF does not create viewsets for its objects, so a view that doesn’t generate a model will not use this method. However, the DRF provides the ModelViewset class if the model requires CRUD operations.
Versioning
Versioning is a powerful tool in the Django REST framework. You can use it to record incremental API changes separately from endpoint logic. This way, you’ll only need to write version compatibility once per change. This will help you maintain the framework and let you make changes to the API without worrying about their effect on your application.
Django REST framework is an easy-to-use framework that makes it easy for developers to build RESTful APIs. The framework provides a rich and flexible toolkit for developing web services and is highly customizable. Because it follows the REST pattern, you can extend many components with different codebases.
Permissions
Django Rest Framework’s Permissions control who can access different API endpoints. You can restrict access to a specific object or a group. You can also define an expiration date for an object. Users may not be able to access objects that are no longer active. The DELETE flag should be implemented to prevent users from accessing objects that have been deleted.
The Django Rest Framework API contains classes that allow you to create and manage permissions. Object-level permissions are used to restrict access to model objects. You can check permissions by overriding get_object. In case of an override, you should make sure you call self.check_object_permissions() to determine whether the request is permitted to access the object. If the permission is denied, the function will return an error. Otherwise, it will return True.
