<?php
/**
+-----------------------------------------------------------------------------------------------------------------------
 * 模型层：广告 模型类
+-----------------------------------------------------------------------------------------------------------------------
 *
 * PHP version 7
 *
 * @category  App\Models\Category
 * @package  App\Models\Category
 * @author    Richer <yangzi1028@163.com>
 * @date      2023年4月20日13:48:05
 * @copyright 2014-2023 Richer (http://www.Richer.com/)
 * @license   http://www.Richer.com/ License
 * @link      http://www.Richer.com/
 */
namespace App\Models\Category;

use App\Models\BaseModel;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\HasOne;

/**
 * Class CategoryExample
 * @property mixed body
 * @property mixed description
 * @property mixed answer
 * @package App\Models
 */
class CategoryExample extends BaseModel
{
    // 指定数据库表
    const TABLE = 'category_examples';
    protected $table = self::TABLE ;

    // 指定对象显示名称：方便系统统一查询和做其他处理
    const OBJ_NAME = 'category-example';
    const OBJ_NAME_ZH = '实例展示';

    /**
     * 下单用户
     *
     * @return BelongsTo
     */
    public function category(): BelongsTo
    {
        return $this->belongsTo(Category::class)->withTrashed();
    }

    /**
     * @return HasOne
     */
    public function answer(): HasOne
    {
        return $this->hasOne(get_class($this), 'pid', 'id')->orderBy('sort');
    }

    /**
     * @return HasMany
     */
    public function answers(): HasMany
    {
        return $this->hasMany(get_class($this), 'pid', 'id')->orderBy('sort');
    }

    /**
     * @return HasMany
     */
    public function question(): HasMany
    {
        return $this->hasMany(get_class($this), 'id', 'pid');
    }

}