Updates

ETB-API/venv/lib/python3.12/site-packages/rest_framework/mixins.py

@@ -0,0 +1,95 @@
+"""
+Basic building blocks for generic class based views.
+
+We don't bind behaviour to http method handlers yet,
+which allows mixin classes to be composed in interesting ways.
+"""
+from rest_framework import status
+from rest_framework.response import Response
+from rest_framework.settings import api_settings
+
+
+class CreateModelMixin:
+    """
+    Create a model instance.
+    """
+    def create(self, request, *args, **kwargs):
+        serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        self.perform_create(serializer)
+        headers = self.get_success_headers(serializer.data)
+        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
+
+    def perform_create(self, serializer):
+        serializer.save()
+
+    def get_success_headers(self, data):
+        try:
+            return {'Location': str(data[api_settings.URL_FIELD_NAME])}
+        except (TypeError, KeyError):
+            return {}
+
+
+class ListModelMixin:
+    """
+    List a queryset.
+    """
+    def list(self, request, *args, **kwargs):
+        queryset = self.filter_queryset(self.get_queryset())
+
+        page = self.paginate_queryset(queryset)
+        if page is not None:
+            serializer = self.get_serializer(page, many=True)
+            return self.get_paginated_response(serializer.data)
+
+        serializer = self.get_serializer(queryset, many=True)
+        return Response(serializer.data)
+
+
+class RetrieveModelMixin:
+    """
+    Retrieve a model instance.
+    """
+    def retrieve(self, request, *args, **kwargs):
+        instance = self.get_object()
+        serializer = self.get_serializer(instance)
+        return Response(serializer.data)
+
+
+class UpdateModelMixin:
+    """
+    Update a model instance.
+    """
+    def update(self, request, *args, **kwargs):
+        partial = kwargs.pop('partial', False)
+        instance = self.get_object()
+        serializer = self.get_serializer(instance, data=request.data, partial=partial)
+        serializer.is_valid(raise_exception=True)
+        self.perform_update(serializer)
+
+        if getattr(instance, '_prefetched_objects_cache', None):
+            # If 'prefetch_related' has been applied to a queryset, we need to
+            # forcibly invalidate the prefetch cache on the instance.
+            instance._prefetched_objects_cache = {}
+
+        return Response(serializer.data)
+
+    def perform_update(self, serializer):
+        serializer.save()
+
+    def partial_update(self, request, *args, **kwargs):
+        kwargs['partial'] = True
+        return self.update(request, *args, **kwargs)
+
+
+class DestroyModelMixin:
+    """
+    Destroy a model instance.
+    """
+    def destroy(self, request, *args, **kwargs):
+        instance = self.get_object()
+        self.perform_destroy(instance)
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+    def perform_destroy(self, instance):
+        instance.delete()