后台用户已获得专题删除问题

知识付费后台管理员删除用户已获得的专题时无法删除专栏专题问题

修改方法：del_special_buy()

public function del_special_buy($id = 0)
    {
        if ($id == 0) return Json::fail('缺少参数');
        $specialBuy = SpecialBuy::get($id);
        if (!$specialBuy) return Json::fail('记录不存在');
        $type = SpecialBuy::where('id',$id)->value('type');
        $special_type = Special::where('id',$specialBuy['special_id'])->value('type');
        $res = SpecialBuy::where('id', $id)->update(['is_del' => 1]);
        if ($special_type == SPECIAL_COLUMN) {
            $res2 = true;
            if(SpecialBuy::be(['uid' => $specialBuy['uid'], 'type' => $type, 'column_id' => $specialBuy['special_id'], 'is_del' => 0])){
                $res2 = SpecialBuy::where(['uid' => $specialBuy['uid'], 'type' => $type, 'column_id' => $specialBuy['special_id'], 'is_del' => 0])->update(['is_del' => 1]);
            }
            $res = $res && $res2;
        }
        if ($res) {
            switch ($type) {
                case 0:
                case 1:
                case 2:
                case 4:
                    $source = 2;
                    $type = 1;
                    break;
                case 3:
                case 5:
                    $source = 3;
                    $type = 2;
                    break;
                default:
                    $source = 1;
                    $type = 0;
            }
            TestPaperObtain::delTestPaper($specialBuy['order_id'], $specialBuy['uid'], $specialBuy['special_id'], $source);
            DataDownloadBuy::delDataDownload($specialBuy['order_id'], $specialBuy['uid'], $specialBuy['special_id'], $type);
            return Json::successful('删除成功');
        } else
            return Json::fail('删除失败');
    }