keuangan/app/Domains/Billing/Providers/RelationshipServiceProvider.php

<?php

namespace App\Domains\Billing\Providers;

use App\Domains\Billing\Models\Invoice;
use App\Domains\Channel\Models\Client;
use Illuminate\Support\ServiceProvider;

class RelationshipServiceProvider extends ServiceProvider
{
    /**
     * Boot cross-domain runtime relationships.
     *
     * This provider is strictly dedicated to runtime, decoupled cross-domain
     * relationship definitions. Use Model::resolveRelationUsing() here to wire
     * explicit polymorphic or foreign-key macros between models that live in
     * different domains — without introducing a hard compile-time dependency
     * between those domains.
     *
     * Do NOT add route registrations, bindings, event listeners, or any other
     * bootstrapping logic here. Keep this file focused on relationships only.
     *
     * Example:
     *
     *   Order::resolveRelationUsing('customer', fn (Order $order) =>
     *       $order->belongsTo(Customer::class, 'customer_id')
     *   );
     */
    public function boot(): void
    {
        Invoice::resolveRelationUsing('client', function (Invoice $invoice) {
            return $invoice->belongsTo(Client::class, 'client_id');
        });
        Client::resolveRelationUsing('invoices', function (Client $client) {
            return $client->hasMany(Invoice::class, 'client_id');
        });
    }
}