Amazingly short non-sequential url-friendly unique id generator.
ShortId creates amazingly short non-sequential url-friendly unique ids. Perfect for url shorteners, MongoDB and Redis ids, and any other id users might see.
- By default 7-14 url-friendly characters:
A-Z,a-z,0-9,_- - Non-sequential so they are not predictable.
- Supports
cluster(automatically), custom seeds, custom alphabet. - Can generate any number of ids without duplicates, even millions per day.
- Perfect for games, especially if you are concerned about cheating so you don't want an easily guessable id.
- Apps can be restarted any number of times without any chance of repeating an id.
- Popular replacement for Mongo ID/Mongoose ID.
- Works in Node, io.js, and web browsers.
- Includes Mocha tests.
var shortid = require('shortid');
console.log(shortid.generate());
//PPBqWA9Mongoose Unique Id
_id: {
type: String,
unique: true,
'default': shortid.generate
},The best way to use shortid in the browser is via browserify or webpack.
These tools will automatically only include the files necessary for browser compatibility.
All tests will run in the browser as well:
## build the bundle, then open Mocha in a browser to see the tests run.
$ grunt build open~/projects/shortid ❯ node examples/examples.js
eWRhpRV
23TplPdS
46Juzcyx
dBvJIh-H
2WEKaVNO
7oet_d9Z
dogPzIz8
nYrnfYEv
a4vhAoFG
hwX6aOr7shortId was created for Node Knockout 2011 winner for Most Fun Doodle Or Die.
Millions of doodles have been saved with shortId filenames. Every log message gets a shortId to make it easy
for us to look up later.
Here are some other projects that use shortId:
- bevy - A simple server to manage multiple Node services.
- capre - Cross-Server Data Replication.
- cordova-build - an alternative to phonegap build that runs on your servers/agents.
- couchdb-tools - A library of handy functions for use when working with CouchDB documents.
- CleverStack/clever-email - E-mail system for CleverStack.
- CloudTypes - JavaScript end2end implementation of the Cloud Types model for Eventual Consistency programming.
- dnode-tarantula - an asynchronous rpc and event system for node.js based on dnode-protocol and TCP sockets.
- mongoose-url-shortener - A simple URL Shortening library for NodeJS using Promises/A+ results.
- mozilla/smokejumper - The Smoke Jumper project is an effort to bring dead simple, secure, P2P file sharing to Firefox.
- shortness - Node based URL shortener that uses SQLite.
- file-db - Document database that uses directories and files to store its data, supporting nested key-value objects in named collections.
- resume-generator - Resume Generator.
- riffmint - Collaboration in musical space.
- rap1ds/dippa - Dippa Editor – A web-based LaTeX editor
var shortid = require('shortid');
Returns string non-sequential unique id.
Example
users.insert({
_id: shortid.generate()
name: ...
email: ...
});Default: '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_'
Returns new alphabet as a string
Recommendation: If you don't like _ or -, you can to set new characters to use.
Optional
Change the characters used.
You must provide a string of all 64 unique characters. Order is not important.
The default characters provided were selected because they are url safe.
Example
// use $ and @ instead of - and _
shortid.characters('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$@');// any 64 unicode characters work, but I wouldn't recommend this.
shortid.characters('ⒶⒷⒸⒹⒺⒻⒼⒽⒾⒿⓀⓁⓂⓃⓄⓅⓆⓇⓈⓉⓊⓋⓌⓍⓎⓏⓐⓑⓒⓓⓔⓕⓖⓗⓘⓙⓚⓛⓜⓝⓞⓟⓠⓡⓢⓣⓤⓥⓦⓧⓨⓩ①②③④⑤⑥⑦⑧⑨⑩⑪⑫');
