带有猫鼬 node.js 的时间序列文档？

Question

I have a schema like this below.

const activePowerSchema = new mongoose.Schema({
  nr: {
type: String,
required: true,
minlength: 2,
maxlength: 50
},

 value: { 
type: [Number],
required: true,
minlength: 0
},

 epoch_timestamp: {
type: Number,
required: true,
minlength: 0
}
});

now the data should be pushed into "value" for 5 mins in a document and after 5 mins instead of pushing into "value" it creates another document and push the data into "value" for next 5 mins and so on eg

{"nr": "test_nr", "epoch_timestamp":"1556114198", "value":[200,300,500,200]} 

and after 5 mins a new document like..

{"nr": "test_nr", "epoch_timestamp":"1557114198", "value":[1200,2300,5400,1200]} and so on..

is there any thing present within mongoose or do i have to make a logic to check the time if its less then 5 min then push into array and after every 5 mins a new document? thanks a lot

Answer 1

The only thing that comes to my mind is creating a new collection which will have only 1 document:

const lastEpochSchema = new mongoose.Schema({
    timestamp: { type: Date },
});

module.exports = mongoose.model('LastEpoch', lastEpochSchema);

And then every time you want to insert a new value into activePower you simply query for:

const lastEpoch = await LastEpoch.findOne();

Then compare it with current Date.now() and if the difference is more than 5*1000 (5 secs) then update LastEpoch and insert a new document into activePower . If less than 5 secs - push values to the current activePower where activePower.epoch_timestamp will be equal to LastEpoch .