From 3cbe691e2617eeefef3d54a8083b2d05243f0d38 Mon Sep 17 00:00:00 2001
From: yhx-12243 <yhx12243@gmail.com>
Date: Tue, 10 Dec 2024 10:38:24 +0800
Subject: [PATCH] fix: ?property formula, resolve #205 (#206)

---
 packages/core/src/Formula.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/core/src/Formula.ts b/packages/core/src/Formula.ts
index a6131367..3fddbed2 100644
--- a/packages/core/src/Formula.ts
+++ b/packages/core/src/Formula.ts
@@ -140,7 +140,7 @@ export function evaluate<T, V extends boolean | null = boolean>(
       if (f.value === null) {
         return !known
       }
-      if (!known) {
+      if (!known || traits.get(f.property) === null) {
         return undefined
       }
       return traits.get(f.property) === f.value