Laravel not publishing to Redis - php

Question

I am trying to implement Redis publishing in my local RESTful API which is built in Laravel for the purposes of implementing a chat system later on with Web Sockets. I intend to read them from a Node.JS server later on.
I am using Redis::publish to publish a simple message to my test-channel.
However, for some reason Laravel doesn't seem to publish to it.
I have also noticed that when I call Redis::set, whatever I set doesn't get persisted in Redis, but using Redis::get I can read the values that I'm setting.
public function redis(Request $request) {
$data = $request->validate([
'message' => 'string|required'
]);
Redis::publish('test-channel', 'a test message');
return 'Done';
}
I am using the code above in the api/redis route:
Route::post('/redis', 'API\MessageController#redis');
I have subscribed to the test-channel using the redis-cli command.
If I manually publish a message to the test-channel using the redis-cli in a terminal instance, I properly receive the messages that I am publishing. However, they don't seem to get published with Laravel for some reason.
What I can notice while running php artisan serve and visiting the aforementioned route is Laravel logging the following:
[*timestamp*] 127.0.0.1:39448 Accepted
[*timestamp*] 127.0.0.1:39448 Closing
The port after 127.0.0.1 appears to be random.
I tried both php-redis php extension and the predis package, just to be sure that it isn't any one of them, but I get the same result with both of them. I am currently using php-redis with both igbinary and redis extensions enabled in /etc/php/config.d and have removed the Redis alias from config/app.php.
I am using PHP 7.4, Laravel 6.0 and Redis 5.0.7 on Manjaro.

Answer 1

Been there, discovered that with:
$ redis-client
psubscribe *
will show you what's going on.
Chances are that your default config/database.php contains something like:
'redis' => [
'client' => env('REDIS_CLIENT', 'predis'),
'options' => [
'cluster' => env('REDIS_CLUSTER', 'redis'),
'prefix' => env('REDIS_PREFIX', Str::slug(env('APP_NAME', 'laravel'), '_').'_database_'),
],
In that case, the channel name will be prefixed with this prefix option.
So you can just comment this option, or, if you keep it, be sure to subscribe to the right channel
Redis::publish('test-channel', 'a test message');
$prefix = config('database.redis.options.prefix');
$channel = $prefix . 'test-channel';
return "Done. (published on $channel)";