我正在尝试创建一个文档来使用 mongoose 进行建模，但是 model.create() 没有返回任何承诺

Question

似乎 create 方法没有返回任何可以处理的承诺我尝试了不同的事情但没有任何效果这是我的路由文件

 const express = require("express") const router = express.Router(); const controller = require("./controller") router.post("/signup", controller.create); module.exports = router;

这是我的模型文件

 const mongoose = require('mongoose'); const User = new mongoose.Schema( { firstName: { type: String, required: true }, lastName: { type: String, required: true }, picture: { type: String }, password: { type: String, select: false }, email: { required: true, type: String, unique: true } }, { timestamps: true } ); User.index({ firstName: 'text', lastName: 'text', }); module.exports = mongoose.model('User', User);

这是控制器文件

 const User = require('./model'); const { hash, compareHash } = require('../lib/util'); const { createToken, findUserByToken } = require('../lib/auth'); const cookieIsSecure = process.env.ENVIRONMENT === 'production'; exports.create = async (req, res) => { const password = await hash(req.body.password); const rawUser = { ...req.body, password, }; User.create(rawUser) .then(async user => { return user.save(); }) .then(async user => { const newUser = user.toObject(); res.send(newUser); }) .catch(err => { if (err.code === 11000) { res.status(400).send({ message: 'A user with this email address has already registered.' }); return; } res.status(500).send({ message: 'An unexpected error occurred' }); }); };

它总是返回 500 错误“发生意外错误”，这并不是很具体。 我不知道到底是什么问题。 但我确信它与 model.create() 有关系，它不会返回任何承诺。

Answer 1

这里是混合方法。 create不想save在其中，因为它是隐式的：

https://mongoosejs.com/docs/api.html#model_Model.create

请试试这个，我已经重构了你的代码，并增加了更容易阅读和使用 try/catch：

const rawUser = new User({ ...req.body, password});

try {
  await rawUser.save();
  res.status(201).send(newUser);
} catch(err) {
  if (err.code === 11000) return res.status(400).send({ message: 'A user with this email address has already registered.' });
  res.status(500).send({ message: 'An unexpected error occurred' });  
}

Answer 2

您需要像这样使用 async/await：

exports.create = async (req, res) => {
  try {
    const password = await hash(req.body.password);
    const rawUser = {
      ...req.body,
      password
    };

    const user = await User.create(rawUser);
    const newUser = user.toObject();
    res.send(newUser);
  } catch (err) {
    console.log("ERROR: ", err);
    if (err.code === 11000) {
      return res.status(400).send({
        message: "A user with this email address has already registered."
      });
    }
    res.status(500).send({ message: "An unexpected error occurred" });
  }
};