cssd-back/app/Models/Cycle.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;

class Cycle extends Model
{
    public $fillable = [
        'date', 'user_id', 'cycle_number', 'sterilizer_id', 'note', 'verified', 'unique_id'
    ];

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    public function labels(): BelongsToMany
    {
        return $this->belongsToMany(Label::class, 'cycle_label')
            ->withPivot('count');
    }

}