vue前端可以完整的显示编辑子级部门，用户管理可以为用户分配角色和部门？

<template>
  <div class="s">
    <!-- 操作按钮 -->
    <div class="shang">
      <el-input v-model="searchText" placeholder="请输入搜索关键词" style="width: 500px;"></el-input>
      <el-button type="primary" @click="search">搜索</el-button>
      <el-button @click="resetForm">重置</el-button>
    </div>
    <br>
    <el-button type="primary" @click="showAddDialog">新增用户</el-button>
    <el-table :data="tableData" style="width: 100%">
      <el-table-column prop="name" label="姓名"></el-table-column>
      <el-table-column prop="user_email" label="邮箱号"></el-table-column>
      <el-table-column label="角色">
        <template slot-scope="scope">
          {
    { getRoleName(scope.row.role_id) }}
        </template>
      </el-table-column>

      <el-table-column label="部门">
        <template slot-scope="scope">
          <span v-for="(department, index) in scope.row.department_id" :key="department">
            {
    { department.split(' ----- ').pop() }}
          </span>
        </template>
      </el-table-column>

      <el-table-column label="操作">
        <template slot-scope="scope">
          <el-button size="mini" @click="showEditDialog(scope.row)">编辑</el-button>
          <el-button size="mini" type="danger" @click="handleDelete(scope.row.user_id)">删除</el-button>