sfp_api_laravel_ginastica_cerebro/app/Models/ClassPackage.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\SoftDeletes;

/**
 * @property int $id
 * @property string $name
 * @property int $quantity_classes
 * @property float $contract_value
 * @property float $contract_material_value
 * @property float $contract_register_value
 * @property float|null $contrat_discount_value
 * @property \Carbon\Carbon $created_at
 * @property \Carbon\Carbon $updated_at
 */
class ClassPackage extends Model
{
    use HasFactory, SoftDeletes;

    protected $table = 'class_packages';

    protected $guarded = ['id'];

    protected $casts = [
        'quantity_classes'        => 'integer',
        'contract_value'          => 'float',
        'contract_material_value' => 'float',
        'contract_register_value' => 'float',
        'contrat_discount_value'  => 'float',
        'created_at'              => 'datetime',
        'updated_at'              => 'datetime',
    ];

    public function units(): BelongsToMany
    {
        return $this->belongsToMany(Unit::class, 'class_package_units')
            ->withPivot('visible')
            ->withTimestamps();
    }

    public function products(): BelongsToMany
    {
        return $this->belongsToMany(Product::class, 'class_package_products')
            ->withPivot(['quantity', 'price'])
            ->withTimestamps();
    }
}