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# \$1sort
<a name="sort"></a>

`$sort`聚合阶段根据指定的字段值对管道中的文档进行排序。根据提供的排序标准，文档按升序或降序排列。

**参数**
+ `field`：要作为排序依据的字段名称。
+ `order`：`1`用于升序或`-1`降序。

## 示例（MongoDB 外壳）
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以下示例演示了使用`$sort`舞台按价格降序对产品进行排序。

**创建示例文档**

```
db.products.insertMany([
  { _id: 1, name: "Laptop", category: "Electronics", price: 1200 },
  { _id: 2, name: "Mouse", category: "Electronics", price: 25 },
  { _id: 3, name: "Desk", category: "Furniture", price: 350 },
  { _id: 4, name: "Chair", category: "Furniture", price: 150 },
  { _id: 5, name: "Monitor", category: "Electronics", price: 400 }
]);
```

**查询示例**

```
db.products.aggregate([
  { $sort: { price: -1 } }
]);
```

**输出**

```
[
  { _id: 1, name: 'Laptop', category: 'Electronics', price: 1200 },
  { _id: 5, name: 'Monitor', category: 'Electronics', price: 400 },
  { _id: 3, name: 'Desk', category: 'Furniture', price: 350 },
  { _id: 4, name: 'Chair', category: 'Furniture', price: 150 },
  { _id: 2, name: 'Mouse', category: 'Electronics', price: 25 }
]
```

## 代码示例
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要查看使用`$sort`聚合阶段的代码示例，请选择要使用的语言对应的选项卡：

------
#### [ Node.js ]

```
const { MongoClient } = require('mongodb');

async function example() {
  const client = await MongoClient.connect('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false');
  const db = client.db('test');
  const collection = db.collection('products');

  const result = await collection.aggregate([
    { $sort: { price: -1 } }
  ]).toArray();

  console.log(result);
  await client.close();
}

example();
```

------
#### [ Python ]

```
from pymongo import MongoClient

def example():
    client = MongoClient('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false')
    db = client['test']
    collection = db['products']

    result = list(collection.aggregate([
        { '$sort': { 'price': -1 } }
    ]))

    print(result)
    client.close()

example()
```

------