A JS Harmony MongoDB/NeDB ODM


MongoSmash is a super-minimal MongoDB/NeDB ODM for Node.js. It lets you treat JavaScript object as normal, and have changes persisted to MongoDB or NeDB. MongoSmash is implemented using Object.observe, and so is subject to its limitations on changes it can track, and requires Node 0.11.10+. You'll need to invoke node with the --harmony flag.

WARNING: MongoSmash is incomplete. It works, but it's missing a lot of features!

var dbURI = 'mongodb://';
require('mongodb').MongoClient.connect(dbURI, function(errdb) {
  if (err) throw err;
  var smash = require('mongosmash')(db);
  var fido = {breed: 'golden retriever', age: 3, gender: 'm', name: 'Fido'};
  // smash.create(modelname, obj, cb) is shorthand for +'dog', fido); // adds observers. 'dog' is the mongodb collection name, function(errsavedFido) { // savedFido has a _id 
    if (err) throw err;
    savedFido.owner = 'Joe';, function(err) { // no savedFido this time since it's an update 
      if (err) throw err;
      smash.find({name: 'einstein'}, function(errdogs){
        if (err) throw err;
        var einstein = dogs[0];
        // ... do something w/ einstein 

You can run the benchmarks yourself as shown below. The results here are from my MacBookAir5,2. K-ops/sec means "thousand calls of the given function per second", so higher is better.

$ node -v
$ npm run bench
> mongosmash@0.1.0 bench /Users/benglish/mongosmash
> node --harmony bench/test
Failed to load c++ bson extension, using pure JS version
new           | 34.026          | 98.806            | 190.38
save          | 3.504           | 4.999             | 42.67
find          | 2.627           | 2.91              | 10.77
edit          | 55.441          | 174.096           | 214.02
saved edited  | 2.425           | 3.946             | 62.72
delete        | 5.915           | 6.99              | 18.17

Of course a head-to-head comparison with Mongoose isn't necessarily realistic, since MongoSmash doesn't do things like validations. I recommend using a tool like revalidator to do your object validations.

You must pass in either an already-connected MongoDB connection (from nove-mongodb-native) or the NeDB module in its entirety. For the moment, only in-memory NeDB is supported.

Sets up an object (obj) to have its changes tracked so we can save() it later. The modelName is equivalent to a MongoDB collection name. If you're doing this, you probably actually want create.

Does a MongoDB insert or update depending on the current status of the object. The error-first-style callback, which will call with a resultant object if it's a new object. The new object will also have a brand-new _id.

Runs new and then save immediately.

Calls the callback error-first-style with an array of objects matching the MongoDB query. For the moment, projections are not supported.

Deletes obj from the database, callback only takes in error.

Please do! Pull requests, bug reports and feature requests are more than welcome, and should be done using Github PRs and Issues. Please try to conform to existing style (though I'm not very stylish), and don't forget tests and docs! Also, if making a performance improvement, feel free to update the benchmark data. TODOs are in Github Issues.