Question

链接ES6承诺

public static signup(req: express.Request, res: express.Response) {
    UserModel.findOne({ email: req.body.email }).exec()
    .then(existingUser => {
        if(existingUser) {
            return res.send({ message: 'Email is in use' });
        }

        return UserModel.create({
            firstName: req.body.firstName,
            lastName: req.body.lastName,
            email: req.body.email,
            password: req.body.password
        });
    })
    .then(user => {
            return res.send({ token: AuthUtils.createJWT(user)});
    })
    .catch(err => {
        console.log(err);
    });
}

但是，当我尝试return UserModel.create(...)时，Typescript会抛出以下错误：

Argument of type '(existingUser: IUser & _Model<IUser> & EventEmitter) => Response | MongoosePromise<IUser & _Model...' is not assignable to parameter of type '(...args: (IUser & _Model<IUser> & EventEmitter)[]) => void | (IUser & _Model<IUser> & EventEmitt...'. Type 'Response | MongoosePromise<IUser & _Model<IUser> & EventEmitter>' is not assignable to type 'void | (IUser & _Model<IUser> & EventEmitter) | PromiseLike<IUser & _Model<IUser> & EventEmitter>'. Type 'Response' is not assignable to type 'void | (IUser & _Model<IUser> & EventEmitter) | PromiseLike<IUser & _Model<IUser> & EventEmitter>'. Type 'Response' is not assignable to type 'PromiseLike<IUser & _Model<IUser> & EventEmitter>'. Property 'then' is missing in type 'Response'.

.create()返回一个Promise，所以我看不出这是怎么回事。

任何帮助都将不胜感激。

Answer 1

通过在promise的响应上使用<body> <div class='div1'></div> <div class='div2'></div> </body>标志，将控制流添加到现有用户。例如：

existing

Answer 2

我实际上最终为ES6构建了我的项目，以便我可以使用async/await

它允许我彻底简化代码。

public static async signup(req: express.Request, res: express.Response) {
    try {
        let user = await UserModel.findOne({ email: req.body.email }).exec()
        if(user) {
            throw `Email ${user.email} is in use`;
        }
        if(environment.debug) console.log(`Creating new user ${req.body.firstName} ${req.body.lastName} with email ${req.body.email}`);
        user = await UserModel.create({
            firstName: req.body.firstName,
            lastName: req.body.lastName,
            email: req.body.email,
            password: req.body.password
        });
        return res.send({ token: AuthUtils.createJWT(user)});
    } catch(e) {
        console.log(e);
        res.send({ error: e });
    }
}

使用打字稿链接Mongoose中的ES6承诺

2 个答案: