Retrieve data from Redis in Node.js

Question

I have just discovered how cool node js is and was looking at options for persisting. I saw that you could use redis-client to store data in redis and I have been able to store data ok, like so:

var redis = require('redis-client');

var r = redis.createClient();

var messege = {'name' => 'John Smith'};

var type = "Contact";

r.stream.on( 'connect', function() {
  r.incr( 'id' , function( err, id ) {
    r.set( type+':'+id, JSON.stringify(messege), function() {
      sys.puts("Saved to redis");
    });
  });
});

This store a key with a json string as the value. I am however trying to retrieve all the keys from redis and loop around them. I am having trouble figuring out the way to do this, could anyone point me in the right direction?

Cheers

Eef

You may want to look into the redis2JSON module. It may make things easier — Kevin McTigue
– Kevin McTigue, Commented Aug 13, 2011 at 22:02

Brad Dickason · Accepted Answer · 2011-08-12 22:58:45Z

3

To get keys from redis, you should use the .keys parameter. The first parameter that you pass is a 'filter' and .keys will return any items matching the filter.

For example r.keys('*', ...) will return all of the keys in redis as an array.

Here's the documentation on this command: http://redis.io/commands/keys

To loop through them, you can just do a simple for in as follows: r.keys('*', function (keys) { for (key in keys) { console.log(key); } });

answered Aug 12, 2011 at 22:58

Brad Dickason

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2 Comments

RailsSon Over a year ago

ah gotcha. thought it would be something simple like that. total brain freeze. thanks!

Brad Dickason Over a year ago

No prob! I didn't try this code out before writing it, so let me know if you have any issues with it, I'm happy to take a look :)

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