ulthon_admin/app/model/Category.php

<?php

declare(strict_types=1);

namespace app\model;

use think\Model;

/**
 * @mixin think\Model
 */
class Category extends Model
{
  //

  public static function getListLevel()
  {
    $model_list = Category::select();

    // return $model_list;
    return array2level($model_list,0,0);
  }

  public function getTitleImgAttr($value)
  {
    
    return get_source_link($value);
  }

  public function posts()
  {
    return $this->hasMany(PostCategory::class,'category_id');
  }

  /**
   * 返回的对应的post的模型
   *
   * @return void
   */
  public function getPostsModelListAttr()
  {
    $list_post_category = $this->getAttr('posts');

    $list_post = [];

    foreach ($list_post_category as $list_post_category) {
      array_push($list_post,$list_post_category->post);
    }

    return $list_post;
  }

  /**
   * 返回的对应post的数据,性能比模型要高.
   *
   * @return void
   */
  public function getPostsListAttr()
  {
    $list_post_category = $this->getAttr('posts');
    
    $list_post = array_column($list_post_category->append(['post'])->toArray(),'post');

    return $list_post;
  }

}