【TP5】不重复添加数据（案例：专题下的视频管理）

/**
     * author:咔咔
     *
     * 批量给专题添加视频
     */
    public function batchAddVideo()
    {
        $param = $this->request->param();
        if(empty($param)){
            return ajaxReturn(PARAM_ERROR);
        }
        // 已存在的视频
        $existingData  = $this->subjectListModel->existingData($param);
        // 批量添加的视频id
        $addVideoId = $param['ids'];
        // 将批量添加的视频索引与值相等
        foreach($addVideoId as $k=>$v){
            $datas[$v] = $v;
        }
        if(empty($existingData)){
            foreach($datas as $key=>$val){
                $data['vs_id'] = $param['vs_id'];
                $data['vi_id'] = $val;
                $result = $this->subjectListModel->insert($data);
            }
            if($result){
                return ajaxReturn(SUCCESS);
            }
        }
        // 将已将存在的视频索引与值相等
        foreach($existingData as $k=>$v){
            $existencetVideoId[$v] = $v;
        }
        // 移除已经存在的视频id
        foreach($datas as $key => $val){
            if(array_key_exists($key,$existencetVideoId)){
                unset($datas[$key]);
            }
        }
        // 容错当全部数据都存在的时候，datas为空
        if(empty($datas)){
            return ajaxReturn(EXISTENCE);
        }
        foreach($datas as $key=>$val){
            $data['vs_id'] = $param['vs_id'];
            $data['vi_id'] = $val;
            $result = $this->subjectListModel->insert($data);
        }
        if($result){
            return ajaxReturn(SUCCESS);
        }
    }