修复树表数据显示不全&加载慢问题

ruoyi-ui/src/utils/ruoyi.js

@@ -129,24 +129,47 @@ export function praseStrEmpty(str) {
  * @param {*} id id字段 默认 'id'
  * @param {*} parentId 父节点字段 默认 'parentId'
  * @param {*} children 孩子节点字段 默认 'children'
- * @param {*} rootId 根Id 默认 0
  */
-export function handleTree(data, id, parentId, children, rootId) {
-	id = id || 'id'
-	parentId = parentId || 'parentId'
-	children = children || 'children'
-	rootId = rootId || Math.min.apply(Math, data.map(item => { return item[parentId] })) || 0
-	//对源数据深度克隆
-	const cloneData = JSON.parse(JSON.stringify(data))
-	//循环所有项
-	const treeData = cloneData.filter(father => {
-		let branchArr = cloneData.filter(child => {
-			//返回每一项的子级数组
-			return father[id] === child[parentId]
-		});
-		branchArr.length > 0 ? father.children = branchArr : '';
-		//返回第一层
-		return father[parentId] === rootId;
-	});
-	return treeData != '' ? treeData : data;
+export function handleTree(data, id, parentId, children) {
+	let config = {
+		id: id || 'id',
+		parentId: parentId || 'parentId',
+		childrenList: children || 'children'
+	};
+
+	var childrenListMap = {};
+	var nodeIds = {};
+	var tree = [];
+
+	for (let d of data) {
+		let parentId = d[config.parentId];
+		if (childrenListMap[parentId] == null) {
+			childrenListMap[parentId] = [];
+		}
+		nodeIds[d[config.id]] = d;
+		childrenListMap[parentId].push(d);
+	}
+
+	for (let d of data) {
+		let parentId = d[config.parentId];
+		if (nodeIds[parentId] == null) {
+			tree.push(d);
+		}
+	}
+
+	for (let t of tree) {
+		adaptToChildrenList(t);
+	}
+
+	function adaptToChildrenList(o) {
+		if (childrenListMap[o[config.id]] !== null) {
+			o[config.childrenList] = childrenListMap[o[config.id]];
+		}
+		if (o[config.childrenList]) {
+			for (let c of o[config.childrenList]) {
+				adaptToChildrenList(c);
+			}
+		}
+	}
+	return tree;
 }