Building RESTful Python Web Services

Creating a customized permission class for object-level permissions

Create a new Python file named permissions.py within the games folder and enter the following code that, declares the new IsOwnerOrReadOnly class. The code file for the sample is included in the restful_python_chapter_03_04 folder:

from rest_framework import permissions 
 
 
class IsOwnerOrReadOnly(permissions.BasePermission): 
    def has_object_permission(self, request, view, obj): 
        if request.method in permissions.SAFE_METHODS: 
            return True 
        else: 
            return obj.owner == request.user 

The rest_framework.permissions.BasePermission class is the base class from which all permission classes should inherit. The previous lines declare the IsOwnerOrReadOnly class as a subclass of the BasePermission ...