async-validator 异步校验 vue

Question

异步校验，在如果数据为空的时候依然还是会请求这是为啥呀，要怎么修改哦？？？

代码如下：

var validExit = (rule, value, callback) => {
            var phone = /^1(3|4|5|7|8|6|9)\d{9}$/;
            if (value == "") {
                return callback(new Error("请输入用户账户"));
                
            }
            if (!phone.test(value)) {
                return callback(new Error("请输入11位电话号码"));
                
            }
            if (value != "" && phone.test(value)){
                Client({
                    method: 'get',
                    url: '/web/v1/userAccount-username',
                    params: {
                        c_username: value
                    }
                }).then((response) => {
                    if (response.code == 1) {
                        if(response.data){
                            for(let i in response.data){
                                this.formData[i] = response.data[i];
                            }
                            this.disabled = true;
                            callback(new Error("该账户已由其他品牌创建，可直接关联！"));
                            setTimeout(()=>{
                                this.$nextTick(()=>{
                                    this.$refs.formData.clearValidate('c_username');
                                    callback();
                                    console.log(2);
                                })
                                
                            },3000)
                            return;
                        } 
                        
                        callback();
                        this.disabled = false;
                        for(let i in response.data){
                            if(i != 'c_username'){
                                this.formData[i] = '';
                            }
                        }
                    }
                })
                
            }
        };
        
        rules: {
                c_realname: [
                    { required: true, message: "请输入用户名称", trigger: "blur" },
                    { pattern: valid.string_1_15, message: "长度在 1 到 15 个字符", trigger: "blur" }
                ],
                c_username: [
                    { required: true, validator: validExit, trigger: "blur" }
                ],
                c_phone: [
                    { required: true, message: "请输入联系电话", trigger: "blur" },
                    { pattern: valid.phone, message: "请输入11位电话号码", trigger: "blur" }
                ]

            },

Answer 1

@blur="checkExist"
是我自己多写了个校验的请求，以上代码没有任何问题。