MongoDB / pymongo计算两分钟的差异

时间：2021-10-09 06:10:01

I am trying to calculate the difference between two timestamps in mongodb.

我试图计算mongodb中两个时间戳之间的差异。

With MySQL it can easily be achieved using this query

使用MySQL,可以使用此查询轻松实现

SELECT ROUND((TIME_TO_SEC(NOW()) - TIME_TO_SEC(lastseen))/60) AS minutes where lastseen is a timestamp column.

SELECT ROUND((TIME_TO_SEC(NOW()) - TIME_TO_SEC(lastseen))/ 60)AS分钟,其中lastseen是时间戳列。

Here is my schema:

这是我的架构:

{
    "_id" : ObjectId("5aa329cb0b717a0f637b0937"),
    "username" : "admin@mans.com",
    "token" : "1085bbc68a",
    "realname" : "Administrator",
    "lastseen" : ISODate("2018-03-09T19:41:47.552Z")
}

How can I get the time difference between lastseen in the document and datetime.datetime.now() in minutes?

如何获得文档中lastseen和datetime.datetime.now()之间的时差(以分钟为单位)?

1 个解决方案

#1

0  

The $subtract aggregation query operator can be used to find the difference of two dates. e.g

$ subtract聚合查询运算符可用于查找两个日期的差异。例如

query = [{
    '$project': {
        'username': 1,
        'date_diff_mins': { 
             '$divide': [
                 {'$subtract': [datetime.now(), '$lastseen']},
                 1000 * 60
             ] 
        } 
    }
}]
db.collection.aggregate(query)

#1

0  

The $subtract aggregation query operator can be used to find the difference of two dates. e.g

$ subtract聚合查询运算符可用于查找两个日期的差异。例如

query = [{
    '$project': {
        'username': 1,
        'date_diff_mins': { 
             '$divide': [
                 {'$subtract': [datetime.now(), '$lastseen']},
                 1000 * 60
             ] 
        } 
    }
}]
db.collection.aggregate(query)
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