Extending the administration site with custom views
Sometimes, you may want to customize the administration site beyond what is possible through configuring ModelAdmin, creating administration actions, and overriding administration templates. You might want to implement additional functionalities that are not available in existing administration views or templates. If this is the case, you need to create a custom administration view. With a custom view, you can build any functionality you want; you just have to make sure that only staff users can access your view and that you maintain the administration look and feel by making your template extend an administration template.
Let’s create a custom view to display information about an order. Edit the views.py file of the orders application and add the following code highlighted in bold:
from django.urls import reverse
from django.shortcuts import render, redirect, get_object_or_404
from django.contrib.admin.views.decorators...