Verde-Web/app/Models/QrCodeBatch.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

class QrCodeBatch extends Model
{
    use HasFactory, SoftDeletes;

    public const PURPOSE_FREE = 'free_allocation';
    public const PURPOSE_STORE = 'store_inventory';
    public const PURPOSE_PROMO = 'promotional';

    protected $table = 'qr_code_batches';

    protected $fillable = [
        'batch_number',
        'quantity',
        'purpose',
        'target_area_id',
        'target_store_id',
        'created_by_admin_id',
        'printed_at',
        'expires_at',
        'notes',
    ];

    protected function casts(): array
    {
        return [
            'printed_at' => 'datetime',
            'expires_at' => 'datetime',
            'quantity' => 'integer',
        ];
    }

    public function getRouteKeyName(): string
    {
        return 'batch_number';
    }

    public function targetArea(): BelongsTo
    {
        return $this->belongsTo(ServiceArea::class, 'target_area_id');
    }

    public function createdBy(): BelongsTo
    {
        return $this->belongsTo(User::class, 'created_by_admin_id');
    }

    public function codes(): HasMany
    {
        return $this->hasMany(QrCode::class, 'batch_id');
    }
}