Fix Tree Bug: set data does not work

packages/tree/src/model/node.js

@@ -28,7 +28,7 @@ const reInitChecked = function(node) {
 
 const getPropertyFromData = function(node, prop) {
   const props = node.props;
-  const data = node.data;
+  const data = node.data || {};
   const config = props[prop];
 
   if (typeof config === 'function') {
@@ -69,6 +69,12 @@ export default class Node {
     }
 
     if (this.lazy !== true && this.data) {
+      this.setData(this.data);
+    }
+  }
+
+  setData(data) {
+    this.data = data;
     let children;
     if (this.level === -1 && this.data instanceof Array) {
       children = this.data;
@@ -87,7 +93,6 @@ export default class Node {
       }));
     }
   }
-  }
 
   get label() {
     return getPropertyFromData(this, 'label');

packages/tree/src/tree.vue

@@ -68,6 +68,12 @@
       }
     },
 
+    watch: {
+      data(newVal) {
+        this.tree.root.setData(newVal);
+      }
+    },
+
     methods: {
       getCheckedNodes(leafOnly) {
         return this.tree.getCheckedNodes(leafOnly);