mongodb每10分钟后运行一次功能

Question

我在mongodb中有一个文件如下：

{
    id:1,
    requestType: {
        "api1": { 
            count:1,
            firstAttemptTime: 1514360898751.0
        },
        "api2": { 
            count:4,
            firstAttemptTime: 1514366897751.0
        }
    }
}

我想在mongoose中编写一个函数，它根据firstAttemptTime键每隔10分钟调用一次从requestType中删除一个对象。例如，10分钟后文件应如下：

{
    id:1,
    requestType: {
        "api2": { 
            count:4,
            firstAttemptTime: 1514366897751.0
        }
    }
}

Answer 1

您似乎想要根据时间戳删除数据。通过为记录设置TTL，可以在MongoDB中执行此操作，然后无需定期运行函数。您只需创建TTL索引并指定应删除文档的秒数。有关于这个https://docs.mongodb.com/manual/tutorial/expire-data/的教程

Answer 2

像这样的东西会起作用

var mongoose = require('mongoose')
var db = mongoose.createConnection('mongodb://localhost:port/db')
var newSchema = new mongoose.Schema({
    id: Number,
    requestType: { type: {} },
    requestTypeList: { type: [] },
})
var model = db.model('newModel', newSchema)

setTimeout(function(){
    model.find({id: 1}, function(err, doc){
        // remove requestType properties first keyed value
        delete Object.keys(doc.requestType)[0]

        // or

        // remove requestType property's first value as an Array
        delete doc.requestTypeList[0] // I'd recomend because otherwise you'll be left with ever increasing key values like api90000000+ as the first key

        doc.save(function(err){
            if(!err){
                console.log('success :)')
            } else {
                console.log('oh oh')
            }
        })

    })
}, 600000) // 600000ms == 10 minutes

// es 5 or 6 idk..

setTimeout(()=>{
    model.find({id: 1}, (err, doc)=>{
        // remove requestType properties first keyed value
        delete Object.keys(doc.requestType)[0]

        // or

        // remove requestType property's first value as an Array
        delete doc.requestTypeList[0] // I'd recomend because otherwise you'll be left with ever increasing key values like api90000000+ as the first key

        doc.save((err)=>{
            if(!err){
                console.log('success :)')
            } else {
                console.log('oh oh')
            }
        })

    })
}, 600000) // 600000ms == 10 minutes

但我想也许Priidik的TTL答案可能更可靠