How can I retrieve a list of subkeys, branch of master key

[ironmask2004]

Hi, thanks for your greate job, its really helpfull and easy to use.

How can I retrieve a list of subkeys from pattern key (userid:*), then I need to delete all that sub tree keys from redis server.
for now I'm using the run shell command to get that list, but is there an alternative in your library and how do I use it

var result = await Process.run(
'redis-cli', ['--scan', '--pattern', 'userId:$userId:*']);
LineSplitter liness = LineSplitter();
List keys = liness.convert(result.stdout);

for (var i = 0; i < keys.length; i++) {
  await _cache.send_object(['EXPIRE', '${keys[i]}', '-1']);
}

[ra1u]

Have you tried with redis command KEYS

[ironmask2004]

Thanks KEYS works greate , but they siad its not recommanded in production system, its mainly for debugging, while SCAN COMMAND is the wright command for retreving a keys by pattern,

[ra1u]

Oh. I see! Do you have trouble using scan?

Something like - without compiler

var iter = "0"

do{
    r = await _cache.send_object(['scan',iter, 'MATCH','userId:$userId:*');
    iter = r[0]; // update new iterator
    var keys = r[1]; 
    // delete keys for received range
    for (var i = 0; i < keys.length; i++) {
        await _cache.send_object(['EXPIRE', '${keys[i]}', '-1']);
    }
} while(iter != "0");

[ironmask2004]

Thanks, my question has been totally answered,