From 7c48f9178c11e3e05a34a082a3e2f97e3c2da3cd Mon Sep 17 00:00:00 2001
From: liaoxuezhi <liaoxuezhi@baidu.com>
Date: Wed, 30 Oct 2019 20:06:48 +0800
Subject: [PATCH] =?UTF-8?q?filter=20=E5=9C=A8=E5=A4=84=E7=90=86=E7=A9=BA?=
 =?UTF-8?q?=E5=80=BC=E6=97=B6=E4=B8=8E=E5=8E=9F=E6=9D=A5=E4=B8=8D=E4=B8=80?=
 =?UTF-8?q?=E8=87=B4?=
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---
 src/utils/tpl-builtin.ts | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/utils/tpl-builtin.ts b/src/utils/tpl-builtin.ts
index 3b731eea..c888cba2 100644
--- a/src/utils/tpl-builtin.ts
+++ b/src/utils/tpl-builtin.ts
@@ -232,7 +232,16 @@ export const filters: {
                 arg1 = expOrDirective;
             }
             arg1 = arg1 ? (/^('|")(.*)\1$/.test(arg1) ? RegExp.$2 : resolveVariable(arg1, this as any)) : '';
-            fn = value => !!~String(value).toLowerCase().indexOf(arg1);
+
+            // 比对的值是空时直接返回。
+            if (!arg1) {
+                return input;
+            }
+
+            fn = value =>
+                !!~String(value)
+                    .toLowerCase()
+                    .indexOf(arg1);
         }
 
         keys = keys.split(/\s*,\s*/);