Got "script tried accessing undeclared key" when key actually exists

[howz97]

Describe the bug
Got "script tried accessing undeclared key" when key actually exists

To Reproduce
install drongonfly

docker run --network=host --ulimit memlock=-1 docker.dragonflydb.io/dragonflydb/dragonfly

execute

127.0.0.1:6379> set foo bar
OK
127.0.0.1:6379> get foo
"bar"
127.0.0.1:6379> eval "redis.call('GET', 'foo')" 0
(error) ERR Error running script (call to 77563f88f961d5772ea29fbc4a18558997365e67): @user_script:2: script tried accessing undeclared key

Expected behavior
eval should succeed

Environment (please complete the following information):

• OS: [ubuntu 20.04]

• Kernel: Linux ip-172-31-40-58 5.15.0-1058-aws #64~20.04.1-Ubuntu SMP Tue Apr 9 11:11:55 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux

• Containerized?: Docker

• Dragonfly Version: [e.g. 0.3.0]

Reproducible Code Snippet

# Minimal code snippet to reproduce this bug

Additional context
Add any other context about the problem here.

[dranikpg]

It doesn't matter if the key exists or not, it needs to be added to the EVAL command or specific script options should be used #272

[howz97]

I tried append the key to EVAL, while it return (nil) . Is this a bug? @dranikpg

127.0.0.1:6379> set foo bar
OK
127.0.0.1:6379> get foo
"bar"
127.0.0.1:6379> eval "redis.call('GET', KEYS[1])" 1 foo
(nil)
127.0.0.1:6379> 

[romange]

@howz97 you should write : eval "return redis.call('GET', KEYS[1])" 1 foo
note the "return"