laravel 批量更新

     /**
     * 转发动态和资讯数量统计
     */
    public function forwardCounts(FeedModel $feedModel)
    {
        //统计动态转发的id
        $feeds=$feedModel->where('forward_type','feeds')
            ->pluck('forward_id')->toArray();
        //统计动态转发的id出现的次数
        $feeds=array_count_values($feeds);

        //key值对应动态id value值为转发的次数
        foreach($feeds as $key => $value){
            $multipleData[] = [

                'id'=>$key,
                'forward_counts'=>$value,

            ];

        }

        //批量更新数据库数据
        $res = $this->updateBatch('feeds',$multipleData);

        if(!$res) echo '更新出错';


        //统计资讯转发的id
        $news=$feedModel->where('forward_type','news')
            ->pluck('forward_id')->toArray();
        //统计资讯转发的id出现的次数
        $news=array_count_values($news);

        //key值对应动态id value值为转发的次数
        foreach($news as $key => $value){
            $multipleDatas[] = [

                'id'=>$key,
                'forward_counts'=>$value,

            ];

        }

        //批量更新数据库数据
        $ress = $this->updateBatch('news',$multipleDatas);

        if(!$ress) echo '更新出错';

        return '更新成功';

    }


    //同时更新多个记录，参数，表名，数组（别忘了在一开始use DB;）
    public function updateBatch($tableName = "", $multipleData = array()){

        if( $tableName && !empty($multipleData) ) {

            // column or fields to update
            $updateColumn = array_keys($multipleData[0]);
            $referenceColumn = $updateColumn[0]; //e.g id
            unset($updateColumn[0]);
            $whereIn = "";

            $q = "UPDATE ".$tableName." SET ";
            foreach ( $updateColumn as $uColumn ) {
                $q .=  $uColumn." = CASE ";

                foreach( $multipleData as $data ) {
                    $q .= "WHEN ".$referenceColumn." = ".$data[$referenceColumn]." THEN '".$data[$uColumn]."' ";
                }
                $q .= "ELSE ".$uColumn." END, ";
            }
            foreach( $multipleData as $data ) {
                $whereIn .= "'".$data[$referenceColumn]."', ";
            }
            $q = rtrim($q, ", ")." WHERE ".$referenceColumn." IN (".  rtrim($whereIn, ', ').")";

            // Update
            return DB::update(DB::raw($q));

        } else {
            return false;
        }

    }