Return empty change set

api/s24_coordinates.py

@@ -25,11 +25,12 @@ def get_node_coord(name: str, id: str) -> dict[str, float] | None:
 
 def set_node_coord(name: str, id: str, x: float, y: float) -> ChangeSet:
     if not is_junction(name, id):
-        return
+        return ChangeSet()
 
     old = get_node_coord(name, id)
     if old == None:
-        return
+        return ChangeSet()
+
     old_x, old_y = old['x'], old['y']
 
     with conn[name].cursor() as cur:
@@ -42,4 +43,4 @@ def set_node_coord(name: str, id: str, x: float, y: float) -> ChangeSet:
 
     change = ChangeSet()
     change.update('junction', id, 'coord', 'point', str({'x': x, 'y': y}))
-    return change
+    return change