node.js 在连接到本地 mongodb 后停止

我正在尝试连接到我在 mongodb 上的数据库并从中获取一些数据。但是在建立连接后，终端停止运行，我必须按 ctrl+C。

这是我的代码

const express = require('express');
const mongoose = require('mongoose');

const app = express();
const port = 3000;

const dbName = 'inventory';
const dbUrl = `mongodb://localhost:27017/${dbName}`;

// Define the schema and model for the "cars" collection
const carSchema = new mongoose.Schema({
  make: String,
  model: String,
  year: Number
});

const Car = mongoose.model('Car', carSchema);

// Connect to the MongoDB server
mongoose.connect(dbUrl, { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => {
    console.log(`Connected to database '${dbName}'`);

    // Define a GET route handler that fetches all cars from the database

    app.get('/cars', async (req, res) => {
      try {
        const cars = await Car.find();
        console.log(cars); // Log the fetched cars to the console
        res.json(cars);
      } catch (err) {
        console.error(err);
        res.status(500).send('Server error');
      }
    });

    // Start the Express app
    app.listen(port, () => {
      console.log(`Server is listening on port ${port}`);
    });
  })
  .catch((err) => {
    console.error(err);
  });

我知道我已经建立了连接，因为我在我的控制台中得到了这个

{"t":{"$date":"2023-05-13T21:12:56.152-06:00"},"s":"I",  "c":"NETWORK",  "id":51800,   "ctx":"conn29","msg":"client metadata","attr":{"remote":"127.0.0.1:53075","client":"conn29","doc":{"driver":{"name":"nodejs|Mongoose","version":"5.3.0|7.1.1"},"platform":"Node.js v16.17.1, LE","os":{"name":"win32","architecture":"x64","version":"10.0.19045","type":"Windows_NT"}}}}
{"t":{"$date":"2023-05-13T21:13:06.654-06:00"},"s":"I",  "c":"NETWORK",  "id":22943,   "ctx":"listener","msg":"Connection accepted","attr":{"remote":"127.0.0.1:53096","uuid":"9611eab4-7a75-49a0-9b44-d644599fe37c","connectionId":30,"connectionCount":18}}
{"t":{"$date":"2023-05-13T21:13:06.656-06:00"},"s":"I",  "c":"NETWORK",  "id":51800,   "ctx":"conn30","msg":"client metadata","attr":{"remote":"127.0.0.1:53096","client":"conn30","doc":{"driver":{"name":"nodejs|Mongoose","version":"5.3.0|7.1.1"},"platform":"Node.js v16.17.1, LE","os":{"name":"win32","architecture":"x64","version":"10.0.19045","type":"Windows_NT"}}}}

我也进入我的控制台日志

Connected to database 'inventory'
Server is listening on port 3000

我觉得问题出在我的机器上，因为我不知道还能尝试什么。 我之前遇到一个问题，我的 python 应用程序可以连接到我的 mongodb，但我的 node.js 应用程序不能。

你的代码对我来说似乎是正确的，所以我只能提供这些建议：

我做了一些容器的事情，通常防火墙会导致数据库连接出现问题。确保在您的机器和数据库上配置了这些。

此外，检查您是否有权从

inventory

另一个故障排除步骤是查看

cars

您还可以在您的应用程序上尝试调试器，看看它究竟卡在哪里。也许问题出在您的代码中。