John Davidson

Message:

i wanna use ClientInterface in my class constructor and i give an error :

Cannot autowire service "App\Service\DelayReportService": argument "$client" of method "__construct()" references interface "Predis\ClientInterface" but no such service exists. Did you create a class that implements this interface?

seems to be i should add it manually to services.yml i added it like :

Predis\ClientInterface: '@Predis\Client'

and now i give this error:

You have requested a non-existent service "Predis\Client".

what is the solution and why symfony itself dont handle it?

---

My Answer:
To autowire the Predis Interface in Symfony, you need to make sure that the service is properly configured in your Symfony application. Here's how you can do it:

1. First, make sure you have installed the Predis library in your Symfony project using Composer:

bash
composer require predis/predis


2. Next, create a service definition for the Predis ClientInterface in your `services.yaml` file:

yaml
services:
Predis\ClientInterface: '@Predis\Client'


3. Now, you can inject the Predis ClientInterface in your class constructor like this:

php
use Predis\ClientInterface;

class YourClass
{
private $predisClient;

public function __construct(ClientInterface $predisClient)
{
$this->predisClient = $predisClient;
}

// Your class methods here
}


4. Make sure to also enable autowiring in your `services.yaml` file:

yaml
services:
_defaults:
autowire: true


With these steps, Symfony should be able to autowire the Predis ClientInterface in your class constructor without any issues.