area-point-api/app/Repositories/Models/Exam/Paper.php

<?php

namespace App\Repositories\Models\Exam;

use App\Repositories\Enums\ModelStatusEnum;
use App\Repositories\Models\Course\Category;
use App\Repositories\Models\Course\Course;
use App\Repositories\Models\Course\Video;
use App\Repositories\Models\Model;
use App\Repositories\Models\User\User;
use Prettus\Repository\Contracts\Transformable;
use Prettus\Repository\Traits\TransformableTrait;

/**
 * Class Paper.
 *
 * @package namespace App\Repositories\Models\Exam;
 */
class Paper extends Model implements Transformable
{
    use TransformableTrait;

    protected $table = 'exam_papers';

//    protected $casts = [
//        'topics' => 'array'
//    ];

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $guarded = [];


    protected static function boot()
    {
        parent::boot(); // TODO: Change the autogenerated stub
        self::saving(function (Paper $paper) {
            if ($paper->isDirty('topics') && is_array($paper->topics)) {
                $paper->topic_nums = count($paper->topics);
                $paper->mark = Topic::query()->whereIn('id', $paper->topics)->sum('point');
            }
        });
    }

    public function category()
    {
        return $this->belongsTo(Category::class)->select(['id', 'name']);
    }

    public function course()
    {
        return $this->belongsTo(Course::class)->select(['title', 'id']);
    }

    public function video()
    {
        return $this->belongsTo(Video::class)->select(['title', 'id']);
    }

    public function setTopicsAttribute($val)
    {
        if (count($val) == 0) return '';
        $this->attributes['topics'] = '-' . arr2str($val, '-') . '-';
    }

    public function getTopicsAttribute($val)
    {
        return str2arr(trim($val, '-'), '-');
    }

    public function user()
    {
        return $this->belongsTo(User::class)->select(['id', 'name', 'turename', 'mobile']);
    }


    public function getTopicListsAttribute()
    {
        $topics = [];

        if (!isset($this->attributes['topics'])) {
            return $topics;
        }
        foreach (str2arr($this->attributes['topics'], '-') as $topic) {
            $topics[] = Topic::query()->where('id', $topic)->select(['id', 'title', 'type', 'level', 'point', 'body', 'result', 'analysis'])->first();
        }

        return $topics;
    }

    public function getExamStatusAttribute()
    {
        return PaperResult::query()->where('paper_id', $this->attributes['id'])->where('user_id', login_user_id())->where('status', ModelStatusEnum::OK)->exists();
    }
}