Update multiple documents with mongoose using node-cron

问题

I'm trying to update multiple document with mongoose using node-cron. What I'm trying to accomplish is all documents that was created, let's say, July 1, will have an status of inactive after 30 days.

I manage to update multiple document using the code below but I don't know how to update multiple documents with products which date is less than the current date:

I know how to get the list of product that is less than the current date using but I don't know how to apply this logic to the code below -

let currentDate = new Date();
let query = Product.find({ dateCreated: {$lt: currentDate}});

Code is unrelated to what I'm trying to accomplish. This is a sample code that will update multiple documents every 10 seconds.

const mongoose  = require('mongoose');
const Product   = require('../model/product');
const cron      = require('node-cron');

cron.schedule('*/10 * * * * *', function(){
    let productArray = ['Bacon', 'Apple', 'Fork', 'Beans'];
    productArray.map(product => updateProduct(product));
});

let updateProduct = (name) => {
    let randomNumber = Math.floor(Math.random() * (999 - 1 + 1));
    let query = Product.findOne({name: name}).select({ 'name': 1 });
    query.exec((err, product) => {
        if(err) throw err;
        if(product){
            product.description = `Random description generate every 10 seconds: ${randomNumber}`;
            product.save(err =>{
                if(err) throw err;
                console.log(`Successfully updated random description for: ${product.name}\n ${product.description}\n`); 
            });
        }
    });
};

Product Schema

const mongoose = require('mongoose');
const Schema   = mongoose.Schema;

const productSchema = mongoose.Schema({
    name            :   String,
    description     :   String,
    status          :   String,
    dateCreated     :   { type: Date, default: Date.now }, // 
});

module.exports = mongoose.model( 'Product', productSchema );

This is the only way I know to update multiple document in mongoose. So is there other way to update multiple document in mongoose after 30 days of creation using mongoose and node-cron? Pardon me if my question is confusing.

回答1:

Here you go the full version of code.

Here you no need to make multiple queries, like first selecting all the products whose currentdate has matched your criteria. Cause that you can do while updating the products itself.

const mongoose = require('mongoose');
const Product = require('../model/product');
const cron = require('node-cron');

cron.schedule('*/10 * * * * *', function() {
    let productArray = ['Bacon', 'Apple', 'Fork', 'Beans'];
    updateAllProducts(productArray, (err, res) => {
        if (err)
            //error handle, you can log here
        else
        //success handle, you can log here
    })
});

let updateAllProducts = (productArray, callbackFn) => {
    let randomNumber = Math.floor(Math.random() * (999 - 1 + 1));
    description = `Random description generate every 10 seconds: ${randomNumber}`;
    Product.update({
        name: {
            $in: productArray
        },
        dateCreated: {
            $lt: currentDate
        }
    }, {
        description: description
    }, {
        multi: true
    }, (err, res) => {
        if (err) {
            callbackFn(err, null)
        } else {
            callbackFn(null, err);
        }

    });

};

In this case you can also log if Db update was failure or success. So there is better control over code. Rather than making multiple Calls in loop. That would be really time consuming and error prone.

Hope this helps!

来源：https://stackoverflow.com/questions/44917031/update-multiple-documents-with-mongoose-using-node-cron

标签

node.js

mongoose

cron

node-cron