How can I save multiple documents concurrently in Mongoose/Node.js?

Question

At the moment I use save to add a single document. Suppose I have an array of documents that I wish to store as single objects. Is there a way of adding them all with a si

Answer 1

Add a file called mongoHelper.js

var MongoClient = require('mongodb').MongoClient;

MongoClient.saveAny = function(data, collection, callback)
{
    if(data instanceof Array)
    {
        saveRecords(data,collection, callback);
    }
    else
    {
        saveRecord(data,collection, callback);
    }
}

function saveRecord(data, collection, callback)
{
    collection.save
    (
        data,
        {w:1},
        function(err, result)
        {
            if(err)
                throw new Error(err);
            callback(result);
        }
    );
}
function saveRecords(data, collection, callback)
{
    save
    (
        data, 
        collection,
        callback
    );
}
function save(data, collection, callback)
{
    collection.save
    (
        data.pop(),
        {w:1},
        function(err, result)
        {
            if(err)
            {               
                throw new Error(err);
            }
            if(data.length > 0)
                save(data, collection, callback);
            else
                callback(result);
        }
    );
}

module.exports = MongoClient;

Then in your code change you requires to

var MongoClient = require("./mongoHelper.js");

Then when it is time to save call (after you have connected and retrieved the collection)

MongoClient.saveAny(data, collection, function(){db.close();});

You can change the error handling to suit your needs, pass back the error in the callback etc.