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Node.js - clent.hgetall & client.hmset in Redis
Redis commands mostly take the input as a single string or an array of strings as arguments and the replies are sent back as a single string or an array of strings. But, while dealing with the hash values, there are a couple of exceptions.
The client.hgetall() function in Node.js – Redis returns an Object keyed by the Hash keys. The strings will be returned either as a string or as a buffer depending upon the setting.
The client.hmset() function supplies the Hash arguments to Redis.
Syntax
client.hmset()
client.hmset(hash, key1, val1, ...keyN, valN, [callback])
client.hgetall()
client.hgetall(hash, callback)
Example 1
Create a file with the name "hmset.js" and copy the following code snippet. After creating the file, use the command "node hmset" to run this code as shown in the example below −
// client.hmset Demo Example
// Importing the redis & assert module
const redis = require("redis");
const client = redis.createClient();
client.hmset("hi", "foo", "bar", "hello", "world");Output
There will be no response because the values are stored in Redis DB.
Example 2
// client.hgetall() Demo Example
// Importing the redis & assert module
const redis = require("redis");
const client = redis.createClient();
client.hmset("hi", "foo", "bar", "hello", "world");
client.hgetall("hi", function(err, value) {
console.log(value.foo);
console.log(value.hello);
});Output
C:\home
ode>> node hgetAll.js bar world
Updated on: 17-Jan-2022
2K+ Views
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