本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。
$isoWeekYear
Amazon DocumentDB 中的$isoWeekYear運算子會傳回指定日期的 ISO 8601 週年編號。ISO 週年編號與 Gregorian 曆年不同，因為該週年可能與曆年不同，尤其是在年初和年底。
參數
範例 (MongoDB Shell)
此範例示範如何使用 $isoWeekYear 運算子來擷取事件集合中每個文件的日期欄位的 ISO 8601 週年。
建立範例文件
db.events.insertMany([
{ _id: 1, name: "Event 1", date: ISODate("2022-12-31T00:00:00Z") },
{ _id: 2, name: "Event 2", date: ISODate("2023-01-01T00:00:00Z") },
{ _id: 3, name: "Event 3", date: ISODate("2023-01-02T00:00:00Z") }
]);
查詢範例
db.events.aggregate([
{ $project: {
name: 1,
isoWeekYear: { $isoWeekYear: "$date" }
}}
]);
輸出
[
{ "_id" : 1, "name" : "Event 1", "isoWeekYear" : 2023 },
{ "_id" : 2, "name" : "Event 2", "isoWeekYear" : 2023 },
{ "_id" : 3, "name" : "Event 3", "isoWeekYear" : 2023 }
]
程式碼範例
若要檢視使用 $isoWeekYear命令的程式碼範例，請選擇您要使用的語言標籤：
- 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 events = db.collection('events');
const result = await events.aggregate([
{ $project: {
name: 1,
isoWeekYear: { $isoWeekYear: '$date' }
}}
]).toArray();
console.log(result);
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
events = db.events
result = list(events.aggregate([
{ '$project': {
'name': 1,
'isoWeekYear': { '$isoWeekYear': '$date' }
}}
]))
print(result)
client.close()
example()
