Create Author mixin

generic/mixins.py

@@ -1,6 +1,30 @@
 from django.contrib.auth.mixins import UserPassesTestMixin
 
+from django.contrib.auth.models import User
+from django.db import models
 
 class SuperuserRequiredMixin(UserPassesTestMixin):
     def test_func(self):
-        return self.request.user.is_superuser
+        return self.request.user.is_superuser
+
+class AuthorMixin():
+    """Mixin class for models that have authors
+    
+    requires an author many to many field to be defined on the derived class
+    
+    """
+    author: models.ManyToManyField[User] # Is this correct typing?
+    
+    def get_author_objects(self) -> list[User]:
+        """Returns list of author objects"""
+        authors = [i for i in self.author.all()]
+        return authors
+
+    def get_authors(self):
+        """Returns a comma separated text list of authors as usernames.
+
+        """
+        authors = ", ".join([i.username for i in self.author.all()])
+        if not authors:
+            return "None"
+        return authors