Resourceable.php

<?php

namespace App\Concerns;

use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

trait Resourceable
{
    public function toResourceArray(?string $class = null, ?Request $request = null): array
    {
        $class = $class ?: $this->resolveResourceName();

        if (class_exists($class) && is_subclass_of($class, JsonResource::class)) {
            return (new $class($this))->resolve($request);
        }

        return $this->toArray();
    }

    protected function resolveResourceName(): string
    {
        $reflect = new \ReflectionClass($this);
        return "\\{$reflect->getNamespaceName()}\\Http\\Resources\\{$reflect->getShortName()}Resource";
    }
}

$user->toResourceArray(MyResource::class);

Riffing on your snippet above to auto detect the common naming pattern so the resource class is optional

trait Resourceable
{
    public function toResourceArray(string $class = null, $request = null) : array
    {
        if (!$class) {
            $class = $this->resolveResourceName();
        }

        if ( $class 
            && class_exists($class)
            && is_subclass_of($class,JsonResource::class) ) {
            return (new $class($this))->resolve($request);
        }

        return $this->toArray();
    }

    private function resolveResourceName()
    {
        return (class_exists(self::class . 'Resource')) ?? null;
    }
}

so that should allow

$user->toResourceArray()

assuming a naming convention of UserResource class.

@christopherarter Nicely Done!

@christopherarter Refactored and Published to Archive with Credits:
https://github.com/bayareawebpro/laravel-examples/blob/master/model-trait-resourceable.md

Awesome!