Mongodb Express网页未加载Mongoose抛出错误

显然，我正在尝试建立一个注册系统，该系统失败，本地服务器网页未加载，
我的用户数据没有被发送到MongoDB，而且VS代码终端向我抛出错误

VS代码错误：

(node:3188) UnhandledPromiseRejectionWarning: MongooseError: Operation `users.insertOne()` buffering timed out after 10000ms
    at Timeout.<anonymous> (E:\Projects\Applications\chatter\node-rest-api\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:3188) 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:3188) [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.

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 has been setup and in running!");
});

我最初在/api/auth中更改代码后，我需要将URL更改为/api/auth/register，但加载要花很长时间

开发人员工具（Ctrl+Shift+I）也显示了以下内容

---

如我所述，您是否尝试过使用try-catch语句？如果您使用的是异步函数，请始终使用try-catch

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 has been setup and in running!");
});