services_core/app/Models/TopologyCustomerConnection.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class TopologyCustomerConnection extends Model
{
    protected $guarded = ['id'];

    protected function casts(): array
    {
        return [
            'connected_at' => 'datetime',
            'disconnected_at' => 'datetime',
            'metadata' => 'array',
        ];
    }

    public function customer()
    {
        return $this->belongsTo(Customer::class);
    }

    public function odpNode()
    {
        return $this->belongsTo(TopologyNode::class, 'odp_node_id');
    }

    public function odpPort()
    {
        return $this->belongsTo(TopologyPort::class, 'odp_port_id');
    }
}