initial commit

core/api/mixins.py

@@ -0,0 +1,9 @@
+class WorkspaceQuerysetMixin:
+    workspace_lookup_url_kwarg = "workspace_id"
+
+    def get_workspace(self):
+        return self.kwargs[self.workspace_lookup_url_kwarg]
+
+    def get_queryset(self):
+        queryset = super().get_queryset()
+        return queryset.filter(workspace_id=self.get_workspace())