Question

我正在尝试创建一个用户模型，但是我得到了：

2018-12-18 09：47：07.567 [错误]：uncaughtException：无法设置未定义TypeError的属性'getUserId'：无法设置属性未定义的“ getUserId”

这是模型：

var User = (userId, name, lastname) => {
    this.userId = userId;
    this.name = name;
    this.lastname = lastname;
    this.tokenizeSingle = null;
    this.tokenizeFile = null;
    this.detokenizeSingle = null;
    this.detokenizeFile = null;
}

User.prototype.getUserId = () => {
    return this.userId;
}

User.prototype.getName = () => {
    return this.name;
}

User.prototype.getLastname = () => {
    return this.name;
}

User.prototype.getFullName = () => {
    return this.name + ' ' + this.lastname;
}

User.prototype.getTokenizeSingle = () => {
    return this.tokenizeSingle;
}

User.prototype.getTokenizeFile = () => {
    return this.tokenizeFile;
}

User.prototype.getDetokenizeSingle = () => {
    return this.detokenizeSingle;
}

User.prototype.getDetokenizeFile = () => {
    return this.detokenizeFile;
}

User.prototype.setPermissions = (tokenizeSingle, tokenizeFile, detokenizeSingle, detokenizeFile) => {
    this.tokenizeSingle = tokenizeSingle || null;
    this.tokenizeFile = tokenizeFile || null;
    this.detokenizeSingle = detokenizeSingle || null;
    this.detokenizeFile = detokenizeFile || null;
}

module.exports = User;

我也在使用VS Code，并且这样做时没有任何建议：var newUser = new User(1, 'Rand', 'Fisk');在newUser中加点并没有显示原型中设置的任何选项。

我想念什么？

Answer 1

箭头函数没有自己的this上下文。更改为常规功能，它应该可以工作：

function User(userId, name, lastname) {
    this.userId = userId;
    this.name = name;
    this.lastname = lastname;
    this.tokenizeSingle = null;
    this.tokenizeFile = null;
    this.detokenizeSingle = null;
    this.detokenizeFile = null;
}

User.prototype.getUserId = function() {
    return this.userId;
}

节点用户模型获取TypeError：无法设置未定义的属性'getUserId'

1 个答案: