sam-manage/app/Models/Approvals/ApprovalLine.php

<?php

namespace App\Models\Approvals;

use App\Models\User;
use App\Traits\BelongsToTenant;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\SoftDeletes;

class ApprovalLine extends Model
{
    use BelongsToTenant, SoftDeletes;

    protected $table = 'approval_lines';

    protected $casts = [
        'steps' => 'array',
        'is_default' => 'boolean',
    ];

    protected $fillable = [
        'tenant_id',
        'name',
        'steps',
        'is_default',
        'created_by',
        'updated_by',
        'deleted_by',
    ];

    // =========================================================================
    // 단계 유형 상수
    // =========================================================================

    public const STEP_TYPE_APPROVAL = 'approval';

    public const STEP_TYPE_AGREEMENT = 'agreement';

    public const STEP_TYPE_REFERENCE = 'reference';

    public const STEP_TYPES = [
        self::STEP_TYPE_APPROVAL,
        self::STEP_TYPE_AGREEMENT,
        self::STEP_TYPE_REFERENCE,
    ];

    // =========================================================================
    // 관계 정의
    // =========================================================================

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

    // =========================================================================
    // 스코프
    // =========================================================================

    public function scopeDefault($query)
    {
        return $query->where('is_default', true);
    }

    // =========================================================================
    // 헬퍼 메서드
    // =========================================================================

    public function getStepCountAttribute(): int
    {
        return count($this->steps ?? []);
    }

    public function getApproverIdsAttribute(): array
    {
        return collect($this->steps ?? [])
            ->pluck('user_id')
            ->filter()
            ->values()
            ->toArray();
    }
}