feat: add pagination for viewsets

Author: paulov59

rest_framework/viewsets.py

@@ -26,6 +26,7 @@
 from rest_framework import generics, mixins, views
 from rest_framework.decorators import MethodMapper
 from rest_framework.reverse import reverse
+from rest_framework.settings import api_settings
 
 
 def _is_extra_action(attr):
@@ -214,7 +215,35 @@ class ViewSet(ViewSetMixin, views.APIView):
     """
     The base ViewSet class does not provide any actions by default.
     """
-    pass
+
+    pagination_class = api_settings.DEFAULT_PAGINATION_CLASS
+
+    @property
+    def paginator(self):
+        """
+        The paginator instance associated with the view, or `None`.
+        """
+        if not hasattr(self, "_paginator"):
+            if self.pagination_class is None:
+                self._paginator = None
+            else:
+                self._paginator = self.pagination_class()
+        return self._paginator
+
+    def paginate_queryset(self, queryset):
+        """
+        Return a single page of results, or `None` if pagination is disabled.
+        """
+        if self.paginator is None:
+            return None
+        return self.paginator.paginate_queryset(queryset, self.request, view=self)
+
+    def get_paginated_response(self, data):
+        """
+        Return a paginated style `Response` object for the given output data.
+        """
+        assert self.paginator is not None
+        return self.paginator.get_paginated_response(data)
 
 
 class GenericViewSet(ViewSetMixin, generics.GenericAPIView):