Allow creation of empty collection via PUT

radicale/__init__.py

@@ -547,13 +547,18 @@ class Application:
             # Case 2: Item and ETag precondition verified: Modify item
             # Case 3: Item and no Etag precondition: Force modifying item
             items = list(vobject.readComponents(content or ""))
-            if items:
             if item:
                 # PUT is modifying an existing item
+                if items:
                     new_item = collection.update(item_name, items[0])
+                else:
+                    new_item = None
             elif item_name:
                 # PUT is adding a new item
+                if items:
                     new_item = collection.upload(item_name, items[0])
+                else:
+                    new_item = None
             else:
                 # PUT is replacing the whole collection
                 collection.delete()