017：将普通json 处理为 el-tree 树形结构

第017个

查看专栏目录: VUE — element UI

vue在使用element UI tree的时候，需要按照了element UI-tree的结构来处理数据。那么如何来处理呢？请参考下面的方法示例

通常原始数据格式为：

datas: [ 
      {
    
     
        id: 13, 
        parentId: 0, 
        order: 1, 
        name: "truck" 
      }, 
      {
    
     
        id: 16, 
        pluginId: null, 
        parentId: 0, 
        order: 1, 
        name: "sca" 
      }, 
      {
    
     
        id: 17, 
        pluginId: 6, 
        parentId: 16, 
        order: 1, 
        name: "abcf" 
      }, 
      {
    
     
        id: 18, 
        pluginId: 13, 
        parentId: 13, 
        order: 1, 
        name: "dddd" 
      } 
    ] 

改变后的格式为：

newdatas: [ 
        {
    
     
          id: 13, 
          name: "truck", 
          order: 1, 
          parentId: 0, 
          children: [ 
            {
    
     id: 18, name: "dddd", order: 1, parentId: 13, children: [] } 
          ] 
        }, 
        {
    
     
          id: 16, 
          name: "sca", 
          order: 1, 
          parentId: 0, 
          children: [ 
            {
    
     id: 17, name: "abcf", order: 1, parentId: 16, children: [] } 
          ] 
        } 
      ], 

实现的方法为：

getListData() {
    
     
    let dataArray = []; 
    this.datas.forEach(function(data) {
    
     
      // if (data.enabled == true) { 
      let parentId = data.parentId; 
      if (parentId == 0) {
    
     
        let objTemp = {
    
     
          id: data.id, 
          name: data.name, 
          order: data.order, 
          parentId: parentId 
        }; 
        dataArray.push(objTemp); 
      } 
      // } 
    }); 
    this.data2treeDG(this.datas, dataArray); 
    this.newdatas = dataArray; 
  
  }, 
  data2treeDG(datas, dataArray) {
    
     
    for (let j = 0; j < dataArray.length; j++) {
    
     
      let dataArrayIndex = dataArray[j]; 
      let childrenArray = []; 
      let Id = dataArrayIndex.id; 
      for (let i = 0; i < datas.length; i++) {
    
     
        let data = datas[i]; 
        // if (data.enabled == true) { 
        let parentId = data.parentId; 
        if (parentId == Id) {
    
     
          //判断是否为儿子节点 
          let objTemp = {
    
     
            id: data.id, 
            name: data.name, 
            order: data.order, 
            parentId: parentId 
          }; 
          childrenArray.push(objTemp); 
        } 
        // } 
      } 
      dataArrayIndex.children = childrenArray; 
      if (childrenArray.length > 0) {
    
     
        //有儿子节点则递归 
        this.data2treeDG(datas, childrenArray); 
      } 
    } 
    return dataArray; 
  }, 

专栏目标

在vue和element UI联合技术栈的操控下，本专栏提供行之有效的源代码示例和信息点介绍，做到灵活运用。

（1）提供vue2的一些基本操作：安装、引用，模板使用，computed，watch，生命周期(beforeCreate，created,beforeMount，mounted, beforeUpdate，updated, beforeDestroy，destroyed，activated，deactivated，errorCaptured，components，)、 $root , $parent , $children , $slots , $refs , props, $emit , eventbus ,provide / inject, Vue.observable, $listeners, $attrs, $nextTick , v-for, v-if, v-else,v-else-if，v-on，v-pre，v-cloak，v-once，v-model， v-html, v-text, keep-alive，slot-scope， filters, v-bind，.stop, .native, directives，mixin，render，国际化，Vue Router等

（2）提供element UI的经典操作：安装，引用，国际化，el-row，el-col，el-button，el-link，el-radio，el-checkbox ，el-input，el-select, el-cascader, el-input-number, el-switch,el-slider, el-time-picker, el-date-picker, el-upload, el-rate, el-color-picker, el-transfer, el-form, el-table, el-tree, el-pagination,el-badge,el-avatar,el-skeleton, el-empty, el-descriptions, el-result, el-statistic, el-alert, v-loading, $message, $alert, $prompt, $confirm , $notify, el-breadcrumb, el-page-header,el-tabs ,el-dropdown,el-steps,el-dialog, el-tooltip, el-popover, el-popconfirm, el-card, el-carousel, el-collapse, el-timeline, el-divider, el-calendar, el-image, el-backtop，v-infinite-scroll， el-drawer等