Node Redis: Get Current Version (Detailed Guide w/ Code Examples)

Use Case(s)

The Redis version is often needed to ensure compatibility with the current Node.js application. For instance, certain features or commands may be available only in specific versions of Redis.

Code Examples

Here's how to get the current version of Redis using Node.js:

var redis = require('redis');
var client = redis.createClient();

client.info(function (err, response) {
    if(err) throw err;
    var version = response.split('\n').filter(line => line.startsWith('redis_version'))[0].split(':')[1];
    console.log(version);
});

In this example, we are making use of the info command provided by Redis. The info command returns a lot of information about the Redis server, including its version. This information is returned as a string, which we split into separate lines. We then filter these lines to find the one that starts with 'redis_version', and split that line to extract the actual version number.

Best Practices

When dealing with the Redis version, it's important to handle errors correctly. If there is an issue connecting to the Redis server or retrieving the information, an error will be thrown. It's good practice to catch this error and handle it appropriately, rather than letting your application crash.

Common Mistakes

One common mistake is not considering the possibility that the Redis server might not be running or accessible. Before trying to get the Redis version, always check that you can connect to the Redis server.

FAQs

Q: Can I use the version information to conditionally use certain Redis features?

A: Yes, you can. Knowing the Redis version can help in writing code that is compatible with multiple versions of Redis.