In Node.js, Redis operations are performed using the
node-redis package. The
HGETALL command is used to fetch all fields and their corresponding values contained in a hash stored at a specific key.
Common use cases include:
Here's an example of how you can get all fields and values from a hash in Redis, via Node:
In this example, we first create a client that connects to our Redis store. Upon successful connection, we set a hash in Redis using
hmset. This hash is named 'frameworks' and contains three key-value pairs. We then retrieve all fields and their corresponding values from the hash using
hgetall. The result is logged to the console.
HGETALLcommand is issued but there's an error (e.g., a network issue or wrong type of stored key), the function will return
null. This should be properly handled in your code.
HGETALLcommand is executed on non-existing keys, Redis will treat it as an empty hash and return an empty list.
What happens if the key does not exist?
What if the stored value against the key is not a hash?
What if I only want to get specific fields from the hash?