Add ActionBasedMixin

core/mixins.py

@@ -0,0 +1,31 @@
+from django.db.models.query import QuerySet
+
+
+class ActionBasedMixin:
+    serializer_class_map = {}
+    permission_classes_map = {}
+    queryset_map = {}
+
+    def get_serializer_class(self):
+        return self.serializer_class_map.get(
+            self.action, self.serializer_class
+        )
+
+    def get_permissions(self):
+        if self.action in self.permission_classes_map:
+            return [
+                permission()
+                for permission in self.permission_classes_map[self.action]
+            ]
+        return super().get_permissions()
+
+    def get_queryset(self):
+        if self.action in self.queryset_map:
+            queryset = self.queryset_map.get(self.action, self.queryset)
+            if isinstance(queryset, QuerySet):
+                queryset = queryset.all()
+            return queryset
+        return super().get_queryset()
+
+    class Meta:
+        abstract = True