Redis 4.x Cookbook

How to do it...

To understand how to use the hash data type, take the following steps:

1. Open a Terminal and connect to Redis with redis-cli.
2. Now, let's set the information properties of the "Kyoto Ramen" restaurant using the HMSET command:

127.0.0.1:6379> HMSET "Kyoto Ramen" "address" "801 Mission St, San Jose, CA" "phone" "555-123-6543" "rating" "5.0" 
OK  

3. Use the HMGET command to retrieve values in a hash:

127.0.0.1:6379> HMGET "Kyoto Ramen" "address" "phone" "rating" 
1) "801 Mission St, San Jose, CA" 
2) "555-123-6543" 
3) "5.0" 

4. To retrieve the value for a single field, use HGET:

127.0.0.1:6379> HGET "Kyoto Ramen" "rating" 
"5.0" 

5. To test if a field exists in the hash, use HEXISTS:

127.0.0.1:6379> HEXISTS "Kyoto Ramen" "phone" (integer) ...