How I got Laravel Precognition working

[jameswagoner]

I came across an issue about Precognition support when I ran into that issue recently and saw that there was no interest really in resolving it so I wanted to share how I solved it and possible get some feedback on it.

First I dug into what Precognition was doing when throwing its Attempting to predict the outcome of the [{$class}::{$method}()] method but the method is not defined. exception.

In the PrecognitionControllerDispatcher class, you'll find ensureMethodExists() where it gets passed the $controller and $method that the handle() method was given.

With how Laravel Actions uses decorators to keep your action classes clean, $controller ends up being the controller decorator instead of the class you defined in the route.

Solution for me was to extend the HandlePrecognitiveRequests middleware and bind my own PrecognitionControllerDispatcher that passes the parsed controller class from the route definition.

namespace Nexus\Precognition;

use Illuminate\Foundation\Routing\PrecognitionControllerDispatcher as BasePrecognitionControllerDispatcher;
use Illuminate\Routing\Route;

class PrecognitionControllerDispatcher extends BasePrecognitionControllerDispatcher
{
    public function dispatch(Route $route, $controller, $method): void
    {
        // In order to work with Laravel Actions
        // we need the controller class from the route action
        $controller = $route->action['controller'];

        $this->ensureMethodExists($controller, $method);

        $this->resolveParameters($route, $controller, $method);

        abort(204, headers: ['Precognition-Success' => 'true']);
    }
}

[AlexisVS]

@jameswagoner
Can you explain more ?