New Process Dataset Sets management

closes #1719 (closed)

requires !2256 (merged)

arkindex/process/api.py

@@ -564,7 +564,7 @@ class StartProcess(CorpusACLMixin, CreateAPIView):
             "model_version__model",
             "configuration",
         )))
-        .prefetch_related(Prefetch("sets", queryset=DatasetSet.objects.select_related("dataset__corpus")))
+        .prefetch_related(Prefetch("sets", queryset=DatasetSet.objects.select_related("dataset")))
         # Uses Exists() for has_tasks and not a __isnull because we are not joining on tasks and do not need to fetch them
         .annotate(has_tasks=Exists(Task.objects.filter(process=OuterRef("pk"))))
     )