pedi3/app/Models/Region.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Region extends Model
{
    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'regiones';

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'nombre',
    ];

    /**
     * Los barrios que pertenecen a la región.
     */
    public function barrios(): HasMany
    {
        return $this->hasMany(Barrio::class);
    }
}