vue表单重置无效

Question

<el-dialog
      v-if="formOpen"
      :visible.sync="formOpen"
      center
      :close-on-click-modal="false"
      :close-on-press-escape="false"
      :title="(form.id==undefined?'添加':'编辑')+'菜单'"
    >
      <el-form ref="form" :model="form" label-width="80px" :rules="formRules">
        <el-form-item label="菜单类型" prop="permissionType">
          <el-radio v-model="form.permissionType" label="folder" border>目录</el-radio>
          <el-radio v-model="form.permissionType" label="menu" border>菜单</el-radio>
          <el-radio v-model="form.permissionType" label="button" border>按钮</el-radio>
        </el-form-item>
        <el-form-item label="上级菜单" prop="pid">
          <treeselect
            v-model="form.pid"
            :multiple="false"
            :options="menuTreeList"
            :normalizer="menuTreeSelectNormalizer"
            placeholder="请选择上级菜单"
            loading-text="正在加载。。。"
            clear-value-text="清空选中的值"
            no-results-text="没有找到结果。。。"
            no-options-text="暂无数据"
            :default-expand-level="Infinity"
          />
        </el-form-item>
        <el-form-item label="菜单名称" prop="permissionName">
          <el-input
            v-model="form.permissionName"
            placeholder="请输入菜单名称"
          />
        </el-form-item>
        <el-form-item label="权限代码" prop="permissionCode">
          <el-input
            v-model="form.permissionCode"
            placeholder="请输入权限代码"
          />
        </el-form-item>
        <el-form-item v-if="form.permissionType=='menu'" label="组件地址" prop="component">
          <el-input
            v-model="form.component"
            placeholder="请输入组件地址"
          />
        </el-form-item>
        <el-form-item label="菜单链接" prop="permissionUrl">
          <el-input
            v-model="form.permissionUrl"
            placeholder=""
          />
        </el-form-item>
        <el-form-item label="菜单图标" prop="permissionIcon">
          <el-input
            v-model="form.permissionIcon"
            placeholder=""
          />
        </el-form-item>
        <el-form-item label="排序" prop="sort">
          <el-input-number v-model="form.sort" label="排序" />
        </el-form-item>
        <el-form-item label="状态" prop="status">
          <el-radio v-model="form.status" label="1" border>启用</el-radio>
          <el-radio v-model="form.status" label="2" border>停用</el-radio>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="handleFormSubmit">确 定</el-button>
        <el-button @click="handleFormClose">取 消</el-button>
      </div>
    </el-dialog>

重置表单的方法

// 表单重置
export function resetForm(refName) {
  if (this.$refs[ refName ]) {
    this.$nextTick(() => {
      this.$refs[ refName ].resetFields()
    })
  }
}

调用this.resetForm('form')无效，上次的表单数据还在
====补充

<template>
  <div class="permission-container">
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
        >新增
        </el-button>
      </el-col>
    </el-row>
    <el-table
      ref="menuList"
      border
      row-key="id"
      :data="menuList"
      default-expand-all
      :tree-props="{children: 'childList'}"
      :header-cell-style="{background:'#eef1f6',color:'#606266'}"
    >
      <el-table-column
        label="菜单名称"
        header-align="center"
        prop="permissionName"
        :show-overflow-tooltip="true">
      </el-table-column>
      <el-table-column label="菜单类型" align="center" prop="permissionUrl" :show-overflow-tooltip="true">
        <template slot-scope="scope">
          <el-tag
            :type="scope.row.permissionType === 'folder' ? 'info' : (scope.row.permissionType === 'menu' ? 'success' : 'primary')"
            disable-transitions>
            {{scope.row.permissionType === 'folder' ? '目录' : (scope.row.permissionType === 'menu' ? '菜单' : '按钮')}}
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column label="权限代码" align="center" prop="permissionCode" :show-overflow-tooltip="true" />
      <el-table-column label="菜单链接" align="center" prop="permissionUrl" :show-overflow-tooltip="true" />
      <el-table-column label="创建时间" prop="createTime" width="170" align="center" />
      <el-table-column label="操作" width="260" align="center">
        <template slot-scope="scope">
          <el-button type="text" icon="el-icon-edit" size="mini" @click="handleUpdate(scope.row)">修改</el-button>
          <el-button type="text" icon="el-icon-plus" size="mini" @click="handleAdd(scope.row)">新增下级</el-button>
          <el-button type="text" icon="el-icon-delete" size="mini" @click="handleDelete(scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <!-- 用户表单 -->
    <el-dialog
      v-if="formOpen"
      :visible.sync="formOpen"
      center
      @close="reset"
      :close-on-click-modal="false"
      :close-on-press-escape="false"
      :title="(form.id==undefined?'添加':'编辑')+'菜单'"
    >
      <el-form ref="form" :model="form" label-width="80px" :rules="formRules">
        <el-form-item label="菜单类型" prop="permissionType">
          <el-radio v-model="form.permissionType" label="folder" border>目录</el-radio>
          <el-radio v-model="form.permissionType" label="menu" border>菜单</el-radio>
          <el-radio v-model="form.permissionType" label="button" border>按钮</el-radio>
        </el-form-item>
        <el-form-item label="上级菜单" prop="pid">
          <treeselect
            v-model="form.pid"
            :multiple="false"
            :options="menuTreeList"
            :normalizer="menuTreeSelectNormalizer"
            placeholder="请选择上级菜单"
            loading-text="正在加载。。。"
            clear-value-text="清空选中的值"
            no-results-text="没有找到结果。。。"
            no-options-text="暂无数据"
            :default-expand-level="Infinity"
          />
        </el-form-item>
        <el-form-item label="菜单名称" prop="permissionName">
          <el-input
            v-model="form.permissionName"
            placeholder="请输入菜单名称"
          />
        </el-form-item>
        <el-form-item label="权限代码" prop="permissionCode">
          <el-input
            v-model="form.permissionCode"
            placeholder="请输入权限代码"
          />
        </el-form-item>
        <el-form-item v-if="form.permissionType=='menu'" label="组件地址" prop="component">
          <el-input
            v-model="form.component"
            placeholder="请输入组件地址"
          />
        </el-form-item>
        <el-form-item label="菜单链接" prop="permissionUrl">
          <el-input
            v-model="form.permissionUrl"
            placeholder=""
          />
        </el-form-item>
        <el-form-item label="菜单图标" prop="permissionIcon">
          <el-input
            v-model="form.permissionIcon"
            placeholder=""
          />
        </el-form-item>
        <el-form-item label="排序" prop="sort">
          <el-input-number v-model="form.sort" label="排序" />
        </el-form-item>
        <el-form-item label="状态" prop="status">
          <el-radio v-model="form.status" label="1" border>启用</el-radio>
          <el-radio v-model="form.status" label="2" border>停用</el-radio>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="handleFormSubmit">确 定</el-button>
        <el-button @click="handleFormClose">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import Treeselect from '@riophae/vue-treeselect'
// import the styles
import '@riophae/vue-treeselect/dist/vue-treeselect.css'
import { addMenu, deleteMenuById, getMenuById, getMenuList, updateMenu } from '@/api/menu'

export default {
  name: 'Menu',
  components: {
    Treeselect
  },
  data() {
    return {
      formOpen: false,
      form: {
        id: undefined,
        pid: '0',
        permissionName: undefined,
        permissionCode: undefined,
        component: undefined,
        permissionType: undefined,
        permissionUrl: undefined,
        permissionIcon: undefined,
        sort: 1,
        status: '1'
      },
      formRules: {
        permissionName: [{
          required: true, message: '请输入菜单名称！', trigger: 'blur'
        }],
        permissionType: [{
          required: true, message: '请选择菜单类型！', trigger: 'blur'
        }]
      },
      menuList: [],
      menuTreeList: [],
      menuTreeSelectNormalizer(node) {
        return {
          id: node.id,
          label: node.permissionName,
          children: node.childList
        }
      },
      queryParams: {}
    }
  },
  created() {
  },
  mounted() {
    this.getMenuList()
  },
  methods: {
    reset() {
      // this.form = Object.assign({}, this.form, this.$options.data().form)
      this.resetForm('form')
    },
    handleAdd(row) {
      // this.$nextTick(() => {
      //   console.log('打开窗口：' + this.$refs[ 'form' ])
      // })
      this.formOpen = true
      this.getMenuTreeList()
      console.log('打开窗口：')
      console.log(this.$refs[ 'form' ])
      console.log(this.form)
      this.reset()
      if (row.id != undefined) {
        // this.form.pid = row.id
        this.form.pid = row.id
      }
    },
    handleUpdate(row) {
      this.formOpen = true
      this.getMenuTreeList()
      this.reset()
      getMenuById(row.id).then((data) => {
        this.$nextTick(() => {
          this.form = data
        })
      }).catch((data) => {
        this.msgError('菜单信息获取失败！')
      })
    },
    handleDelete(row) {
      if (row.childList != undefined && row.childList.length > 0) {
        this.msgError('该部门有子菜单，请先删除子菜单！')
        return
      }
      this.$confirm('是否确认删除菜单【' + row.permissionName + '】？操作无法撤销！', '警告', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        deleteMenuById(row.id).then(() => {
          this.msgSuccess('删除成功！')
          this.getMenuList()
        }).catch(() => {
          this.msgError('删除失败！')
        })
      })
    },
    handleFormSubmit() {
      this.$refs[ 'form' ].validate(valid => {
        if (valid) {
          if (this.form.id == undefined) {
            addMenu(this.form).then((data) => {
              this.msgSuccess('添加成功！')
              this.formOpen = false
              this.getMenuList()
            }).catch(() => {
              this.msgError('添加失败！')
            })
          } else {
            updateMenu(this.form).then((data) => {
              this.msgSuccess('修改成功！')
              this.formOpen = false
              this.getMenuList()
            }).catch(() => {
              this.msgError('修改失败！')
            })
        

Answer 1

el-form 记录的是你渲染组件时候绑定的 v-model，
如果组件的数据在 渲染成功 之前传递，会导致绑定的数据就是初始值！

你的 form 的值的重置靠的是 form 的 resetFields，
重新打开的时候绑定的值依然会是上次的数据，
因为这个就是你的初始值，reset 是无效的！
建议把你的 reset 放到 handleFormClose 里面，调用页面关闭都用这个！
每次关闭之前就回收数据，不要在打开之前回收数据！