Creating test data in MongoDB using node.js

I need to create a fairly large number of test documents in my MongoDB to test some functionality that will be retrieving pages of data, ordered by date.

Rather than doing this by hand, using the Node.js driver for MongoDB makes this pretty easy with only a few lines of code. This is a starting point, in my case I need to add some additional logic to increment a date value and create some other random values on each doc, but this is a rough outline of an approach:

Assuming Node.js already installed, install the MongoDB Node.js driver with:

npm install mongodb

Then the code to install multiple docs in one shot looks something like this:

[code language=”javascript”]

var MongoClient = require(‘mongodb’).MongoClient,
test = require(‘assert’);

var ObjectId = require(‘mongodb’).ObjectID;

MongoClient.connect(‘mongodb://localhost:27017/databasename’, function(err, db) {
test.equal(err, null);

var col = db.collection(‘collectioname’);
var docs = [];

//update this for how many docs to insert

for(i=0; i<10; i++){
docs[i] = {a:i}; // create doc here using json
}

col.insertMany(docs, function(err, r) {
test.equal(err, null);
console.log(r.insertedCount);
db.close();
});
});

[/code]

Run the script with:

node scriptname.js

Additional info in the MongoDB Getting Started Guide for node.js.

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.