const checkName = (rule, value, callback) => {
    if (!value) { 
        if (this.addForm.level == 2) {
            return callback(new Error('权限名不能为空'))
        } else {
            return callback(new Error('菜单名不能为空'))
        }
    } else {
        return callback();
    }
}

addFormRules: {
    name: [
        {required: true, validator: checkName, trigger: ["blur", "change"]},
        {min: 2, max: 15, message: "长度在2至15字符之间", trigger: ["blur", "change"]}
    ],
},