From bf903a804ada02e8421035dff52469a992768602 Mon Sep 17 00:00:00 2001
From: Charles Lee <cpylua@users.noreply.github.com>
Date: Tue, 10 Nov 2020 13:45:13 +0800
Subject: [PATCH] Support different path length in Cascader (#1529)

---
 .../zent/src/cascader/demos/4.multiple.md     | 38 +++++++------------
 packages/zent/src/cascader/forest.ts          |  7 +++-
 2 files changed, 20 insertions(+), 25 deletions(-)

diff --git a/packages/zent/src/cascader/demos/4.multiple.md b/packages/zent/src/cascader/demos/4.multiple.md
index ef6cb504df..f8eed67827 100644
--- a/packages/zent/src/cascader/demos/4.multiple.md
+++ b/packages/zent/src/cascader/demos/4.multiple.md
@@ -28,7 +28,6 @@ en-US:
 import { MenuCascader } from 'zent';
 
 class Simple extends React.Component {
-
 	state = {
 		value: [
 			['330000', '330100', '330106'],
@@ -50,8 +49,8 @@ class Simple extends React.Component {
 							{
 								value: '330107',
 								label: '{i18n.yh}',
-							}
-						]
+							},
+						],
 					},
 					{
 						value: '330200',
@@ -60,10 +59,10 @@ class Simple extends React.Component {
 							{
 								value: '330206',
 								label: '{i18n.lw}',
-							}
-						]
-					}
-				]
+							},
+						],
+					},
+				],
 			},
 			{
 				value: '120000',
@@ -72,24 +71,18 @@ class Simple extends React.Component {
 					{
 						value: '120100',
 						label: '{i18n.be}',
-						children: [
-							{
-								value: '120111',
-								label: '{i18n.al}'
-							}
-						]
-					}
-				]
-			}
-		]
-	}
+					},
+				],
+			},
+		],
+	};
 
 	onChange = (value, selectedOptions, meta) => {
-		console.log(value, selectedOptions, meta)
+		console.log(value, selectedOptions, meta);
 		this.setState({
 			value,
 		});
-	}
+	};
 
 	render() {
 		return (
@@ -104,8 +97,5 @@ class Simple extends React.Component {
 	}
 }
 
-ReactDOM.render(
-	<Simple />
-	, mountNode
-);
+ReactDOM.render(<Simple />, mountNode);
 ```
diff --git a/packages/zent/src/cascader/forest.ts b/packages/zent/src/cascader/forest.ts
index 5730726cda..0f6610cb5e 100644
--- a/packages/zent/src/cascader/forest.ts
+++ b/packages/zent/src/cascader/forest.ts
@@ -299,7 +299,12 @@ export class Forest {
     const { value } = startNode;
 
     return this.reducePath((acc, path) => {
-      if (path[idx].value === value && (!predicate || predicate(path))) {
+      // Paths may have different lengths
+      if (
+        path.length > idx &&
+        path[idx].value === value &&
+        (!predicate || predicate(path))
+      ) {
         acc.push(path);
       }