uuid-mongodb

Generates and parses BSON UUIDs for use with MongoDB. BSON UUIDs provide better performance than their string counterparts.

Inspired by @srcagency's mongo-uuid

Install

npm install uuid-mongodb

Usage

const MUUID = require('uuid-mongodb');

// Create a v1 binary UUID
const mUUID1 = MUUID.v1();

// Create a v4 binary UUID
const mUUID4 = MUUID.v4();

// Print a string representation of a binary UUID
mUUID1.toString()

// Create a binary UUID from a valid uuid string
const mUUID2 = MUUID.from('393967e0-8de1-11e8-9eb6-529269fb1459')

// Create a binary UUID from a MongoDb Binary
// This is useful to get MUUIDs helpful toString() method
const mUUID3 = MUUID.from(/** MongoDb Binary of SUBTYPE_UUID */)

Formatting

UUIDs may be formatted using the following options:

Format	Description	Example
N	32 digits	`00000000000000000000000000000000`
D	32 digits separated by hyphens	`00000000-0000-0000-0000-000000000000`
B	32 digits separated by hyphens, enclosed in braces	`{00000000-0000-0000-0000-000000000000}`
P	32 digits separated by hyphens, enclosed in parentheses	`(00000000-0000-0000-0000-000000000000)`

example:

const mUUID4 = MUUID.v4();
mUUID1.toString(); // equivalent to `D` separated by hyphens
mUUID1.toString('P'); // enclosed in parens, separated by hypens
mUUID1.toString('B'); // enclosed in braces, separated by hyphens
mUUID1.toString('N'); // 32 digits

Modes

uuid-mongodb offers two modes:

canonical (default) - A string format that emphasizes type preservation at the expense of readability and interoperability.
relaxed - A string format that emphasizes readability and interoperability at the expense of type preservation.

The mode is set globally as such:

const mUUID = MUUID.mode('relaxed'); // use relaxed mode

Mode only impacts how JSON.stringify(...) represents a UUID:

e.g. JSON.stringy(mUUID.v1()) outputs the following:

"DEol4JenEeqVKusA+dzMMA==" // when in 'canonical' mode
"1ac34980-97a7-11ea-8bab-b5327b548666" // when in 'relaxed' mode

Examples

Query using binary UUIDs

const uuid = MUUID.from('393967e0-8de1-11e8-9eb6-529269fb1459');
return collection.then(c =>
  c.findOne({
    _id: uuid,
  })
);

Work with binary UUIDs returned in query results

return collection
  .then(c => c.findOne({ _id: uuid }))
  .then(doc => {
    const uuid = MUUID.from(doc._id).toString();
    // do stuff
  });

Examples (with source code)

Native Node MongoDB Driver example

examples/ex1-mongodb.js

snippet:

const insertResult = await collection.insertOne({
  _id: MUUID.v1(),
  name: 'carmine',
});

Mongoose example

examples/ex2-mongoose.js

snippet:

const kittySchema = new mongoose.Schema({
  _id: {
    type: 'object',
    value: { type: 'Buffer' },
    default: () => MUUID.v1(),
  },
  title: String,
});

examples/ex3-mongoose.js

snippet:

// Define a simple schema
const kittySchema = new mongoose.Schema({
  _id: {
    type: 'object',
    value: { type: 'Buffer' },
    default: () => MUUID.v1(),
  },
  title: String,
});

// no need for auto getter for _id will add a virtual later
kittySchema.set('id', false);

// virtual getter for custom _id
kittySchema
  .virtual('id')
  .get(function() {
    return MUUID.from(this._id).toString();
  })
  .set(function(val) {
    this._id = MUUID.from(val);
  });

examples/ex4-mongoose.js

    const uuid = MUUID.v4();

    // save record and wait for it to commit
    await new Data({ uuid }).save();

    // retrieve the record
    const result = await Data.findOne({ uuid });