Node.js Cannot pass function to Redis operations

Question

I am using node.js to store a simple unduplicated list to redis and retrive it.

However, when I trying to check the result like this, the console will not log anything

client.sAdd('frameworks_set',['ReactJS', 'Angular', 'Svelte', 'VueJS', 'VueJS'],function(err, reply){
    console.log("retieved"+ reply)});

client.sMembers('frameworks_set',function(err, reply){
    console.log("retieved"+ reply)
});

I can see that my list has been added to redis successfully but not sure how would I retrieve the list back to node.js now

127.0.0.1:6379> smembers frameworks_set
1) "Angular"
2) "Svelte"
3) "VueJS"
4) "ReactJS"

Leibale Eidelman · Accepted Answer · 2022-07-13 11:56:10Z

1

either await the promise or use .then

// using `await`
await client.sAdd('frameworks_set',['ReactJS', 'Angular', 'Svelte', 'VueJS', 'VueJS']);
const reply = await client.sMembers('frameworks_set');

// using `.then`
client.sAdd('frameworks_set',['ReactJS', 'Angular', 'Svelte', 'VueJS', 'VueJS']).then(() => {
  return client.sMembers('frameworks_set');
}).then(reply => {
  // ...
});

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise

answered Jul 13, 2022 at 11:56

Leibale Eidelman

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