我可以按日期查询MongoDB ObjectId吗?

我知道ObjectIds包含创建日期。有没有办法查询ObjectId的这一方面?

回答:

将时间戳弹出到ObjectId中将详细介绍基于嵌入在ObjectId中的日期的查询。

简要介绍一下JavaScript代码:

// This function returns an ObjectId embedded with a given datetime

// Accepts both Date object and string input

function objectIdWithTimestamp(timestamp) {

// Convert string date to Date object (otherwise assume timestamp is a date)

if (typeof(timestamp) == 'string') {

timestamp = new Date(timestamp);

}

// Convert date object to hex seconds since Unix epoch

var hexSeconds = Math.floor(timestamp/1000).toString(16);

// Create an ObjectId with that hex timestamp

var constructedObjectId = ObjectId(hexSeconds + "0000000000000000");

return constructedObjectId

}

// Find all documents created after midnight on May 25th, 1980

db.mycollection.find({ _id: { $gt: objectIdWithTimestamp('1980/05/25') } });

以上是 我可以按日期查询MongoDB ObjectId吗? 的全部内容, 来源链接: utcz.com/qa/417766.html

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