1. Basic Concepts Django ships with a signal dispatcher built in. Signals help decouple program modules. When an event occurs elsewhere in the application, a designated function is notified. Signals let certain senders notify a group of receivers that some action has taken place. 2. Using Signals 2.1 Declaring a

Django has two kinds of views: function-based views and class-based views. The role of a view is mainly to fill in logic and return a response body. Function-based views are hard to extend and have a low rate of code reuse. Class-based views, on the other hand, can use inheritance

1. Permission Management in DRF Permission management in Django REST Framework consists of two parts. One is Authentication. It specifies how the user is authenticated, obtaining request.user. The other is Permissions. It performs permission control over Django resources and user categories. 1.1 Authentication Methods The relevant source is in the rest_framework/authentication.

1. The Scenario In a project, elements such as the header and footer are often reused. To avoid rewriting these elements on every page, and so that a change does not require editing each page individually, the common parts need to be extracted — that is Django template inheritance. 2.

When developing with a separated front end and back end, some of the API endpoints provided to the front end use GET requests and some use POST requests. To keep the back end from throwing an error while reading values from request in views.py, you had to check the request