sam-manage/app/Models/DocumentTemplateSectionItem.php

<?php

namespace App\Models;

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

class DocumentTemplateSectionItem extends Model
{
    use HasFactory;

    protected $fillable = [
        'section_id',
        'category',
        'item',
        'standard',
        'tolerance',
        'standard_criteria',
        'method',
        'measurement_type',
        'frequency_n',
        'frequency_c',
        'frequency',
        'regulation',
        'field_values',
        'sort_order',
    ];

    protected $casts = [
        'tolerance' => 'array',
        'standard_criteria' => 'array',
        'field_values' => 'array',
        'sort_order' => 'integer',
        'frequency_n' => 'integer',
        'frequency_c' => 'integer',
    ];

    /**
     * field_values 우선, 없으면 기존 컬럼 fallback
     */
    public function getFieldValue(string $key): mixed
    {
        if (! empty($this->field_values) && array_key_exists($key, $this->field_values)) {
            return $this->field_values[$key];
        }

        return $this->attributes[$key] ?? null;
    }

    public function section(): BelongsTo
    {
        return $this->belongsTo(DocumentTemplateSection::class, 'section_id');
    }
}