问题

const MongoClient = require("mongodb").MongoClient;
const assert = require("assert");
const url = "mongodb://localhost:27017";
const dbName = "fruitsDB";
const client = new MongoClient(url, { useNewUrlParser: true });
client.connect(function (err) {
    assert.equal(null, err);
    console.log("connected to the server");
    const db = client.db(dbName);
    client.close();
});

<details>
<summary>英文:</summary>

const MongoClient = require("mongodb").MongoClient;
const assert = require("assert");
const url = "mongodb://localhost:27017";
const dbName = "fruitsDB";
const client = new MongoClient(url, { useNewUrlParser: true });
client.connect(function (err) {
assert.equal(null, err);
console.log("connected to the server");
const db = client.db(dbName);
client.close();
});

   [![image description][1]][1]

   [1]: https://i.stack.imgur.com/crZXW.png

This code should show in the terminal "connected to the server."

</details>


# 答案1
**得分**: 0

你应该使用 `localhost` IP 地址来连接 MongoDB。
我不知道为什么，但当我尝试使用这个 URL 时它不起作用：```"mongodb://localhost:27017"```

请使用这个：

```use const url = "mongodb://127.0.0.1:27017";```

<details>
<summary>英文:</summary>

You should use `localhost` ip address for connecting to mongodb.
I don&#39;t know why but it was not working when i try to do with this url ```&quot;mongodb://localhost:27017&quot;```

Go with this one

```use const url = &quot;mongodb://127.0.0.1:27017&quot;;```

</details>