在使用iview时发现要先重置一下表单然后填写完后再重置可以清空Select多选框，否则清不掉，什么原因？

Question

html代码

<template>
    <Form ref="formValidate" :model="formValidate" :rules="ruleValidate" :label-width="80">
        <FormItem label="姓名" prop="name">
            <Input v-model="formValidate.name" placeholder="请输入姓名"></Input>
        </FormItem>
        <FormItem label="城市" prop="city">
            <Select multiple v-model="formValidate.city" placeholder="请选择所在地">
                <Option value="beijing">北京市</Option>
                <Option value="shanghai">上海市</Option>
                <Option value="shenzhen">深圳市</Option>
            </Select>
        </FormItem>
        <FormItem>
            <Button type="primary" @click="handleSubmit('formValidate')">提交</Button>
            <Button type="ghost" @click="handleReset('formValidate')" style="margin-left: 8px">重置</Button>
        </FormItem>
    </Form>
</template>

js代码

<script>
    export default {
        data () {
            return {
                formValidate: {
                    name: '',
                    city: []
                },
                ruleValidate: {
                    name: [
                        { required: true, message: '姓名不能为空', trigger: 'blur' }
                    ],
                    city: [
                        { type:"array", required: true, message: '请选择城市', trigger: 'change' }
                    ]
                }
            }
        },
        methods: {
            handleSubmit (name) {
                this.$refs[name].validate((valid) => {
                    if (valid) {
                        this.$Message.success('提交成功!');
                    } else {
                        this.$Message.error('表单验证失败!');
                    }
                })
            },
            handleReset (name) {
                this.$refs[name].resetFields();
            }
        }
    }
</script>

Answer 1

请问报这个错误怎么解决"Error in event handler for "click": "TypeError: Cannot read property 'resetFields' of undefined"