卡在装载猫鼬 [英] Stuck in loading with mongoose

问题描述

我正在尝试使用 node.js、mongoose 和 MongoDB 创建一个 Web 应用程序，
我正在尝试加载网页 localhost:8800/api/auth/register，该网页自过去 15 分钟以来一直停留在加载中.

I am trying to create a web-application with node.js, mongoose and MongoDB,
I am trying to load the web-page localhost:8800/api/auth/register which is stuck at loading since past 15 minutes.

VS Code 终端返回以下内容:

VS Code Terminal return the following :

(node:2908) UnhandledPromiseRejectionWarning: MongooseError: Operation `users.insertOne()` buffering timed out after 10000ms
    at Timeout.<anonymous> (E:\Projects\Applications\chitter-chatter\node_modules\mongoose\lib\drivers\node-mongodb-native\collection.js:185:20)
    at listOnTimeout (internal/timers.js:554:17)
    at processTimers (internal/timers.js:497:7)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:2908) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 3)
(node:2908) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:2908) UnhandledPromiseRejectionWarning: MongooseError: Operation `users.insertOne()` buffering timed out after 10000ms
    at Timeout.<anonymous> (E:\Projects\Applications\chitter-chatter\node_modules\mongoose\lib\drivers\node-mongodb-native\collection.js:185:20)
    at listOnTimeout (internal/timers.js:554:17)
    at processTimers (internal/timers.js:497:7)
(node:2908) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 4)

我的脚本如下:

1. Index.js :

1. Index.js :

const application = express();
const mongoose = require("mongoose");
const dotenv = require("dotenv");
const helmet = require("helmet");
const morgan = require("morgan");
const userRoute = require("./routes/users");
const authRoute = require("./routes/auth");

dotenv.config();

mongoose.connect(process.env.MONGO_URL, {useNewUrlParser: true, useUnifiedTopology: true}, () => {
    console.log("connected to MongoDB")
});

// middleware 
application.use(express.json());
application.use(helmet());
application.use(morgan("common"));

application.use("/api/users", userRoute);
application.use("/api/auth", authRoute);

application.listen(8800, () => {
    console.log("backend server is running!")
})

Auth.js :

Auth.js :

const User = require("../models/User");

// REGISTER
router.get("/register", async (req, res) => {
    const user = await new User ({
        username: "john",
        useremail: "[e-mail]",
        userpswrd: "123456"
    })

    await user.save();
    res.send("oK")
});

module.exports = router

我也将 .env 用于 MONGO VIA URL CONNECTION很抱歉提前为糟糕的写作道歉，我也是新手，所以请纠正我！我知道我犯了很多错误，感谢您真诚的时间奉献和同情

I am also using .env for MONGO VIA URL CONNECTION Sorry for the bad writing apologies in advance also I am new to this so pls correct me! I know i have done a lot of mistakes, Thanks for u're sincere time dedication and sympathy

推荐答案

首先，您必须确保连接到数据库没有任何错误.
为此，请开始侦听 connect 的回调函数:

First of all, you must make sure that you are connecting to the database without any error.
To do this, start listening on connect's callback function:

try {
  // This configuration is better
  mongoose.connect(process.env.MONGO_URL, {
    useUnifiedTopology: true,
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
  }, err => {
    if (err) throw Error(err.message);

    console.log("connected to MongoDB");
    application.listen(8800, () => console.log("backend server is running!"));
  });
} catch (error) {
  console.log(error);
}

我认为您应该在像这样的 try-catch 语句中执行此操作:

I think you should make this operation in a try-catch statement like this:

// REGISTER
router.get("/register", async (req, res) => {
  try {
    // Create user in database
    const user = await User.create({
      username: "john",
      useremail: "[e-mail]",
      userpswrd: "123456"
    });
    
    res.status(200).json({ success: true });
  } catch (error) {
    res.status(500).json({ error });
    console.log(error);
  }

});

module.exports = router;

然后你可以看到错误的详细信息，服务器继续运行.
如果您无法解决问题，请在此处添加评论，我会尽快回来

Then you can see error's details, and server keeps running.
If you can't solve the problem just add a comment here I'll be back ASAP

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