lianjie_admin/app/Models/Category.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\SoftDeletes;
use Dcat\Admin\Traits\ModelTree;
use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    use ModelTree;
    use SoftDeletes;

    protected $table = 'lanzu_category';
    protected $dateFormat = 'U';

    // 父级ID字段名称，默认值为 parent_id
    //  protected $parentColumn = 'pid';

    // 排序字段名称，默认值为 order
    protected $orderColumn = 'sort';

    // 标题字段名称，默认值为 title
    //  protected $titleColumn = 'name';

    protected $appends = [
        'cover_img_url',
    ];
    public function getCoverImgUrlAttribute($value)
    {
        $value = $value ? $value : $this->cover_img;
        return $this->imageUrl($value);
    }
    /**
     * 获取二级分类数组
     * id为键，name为值
     * @return array
     */
    public static function getCategoryArray($where = [],$options = [])
    {
        $model = self::select('id','title')
            ->where('status',1)
            ->whereNull('deleted_at');

        if(count($where) > 0){
            $model->where($where);
        }
        $list = $model->get();
        $array = empty($options) ? [] : $options;
        if(count($list) > 0){
            foreach ($list as $value) {
                $array[$value->id]   = $value->title;
            }
        }

        return $array;
    }
    
    /**
     * 处理旧图片
     * @param $value
     * @return string
     */
    public function imageUrl($value)
    {
        if(strripos($value,"http") === false){
            return env('OSS_IMG_HOST').'/'.$value;
        }else{
            return $value;
        }
    }
}