ThinkPHP5 查询数据并处理结果

在处理数据库查询结果时遇到了些问题，记录下用到过的几种查询方式和结果处理。

1. 查询某条记录

$where=array(
    "version_id"=>$version_id
);
$data = model("PackageWhitelist")->where($where)->find();

$this->assign("package_id",$package_id);
$where=array(
    "package_id"=>$package_id
);

$data = model("Package")->where($where)->find();
if($data){
    $this->assign("target_version",$data['target_version']);

}

2. 查询某条记录某个字段

$this->assign("device_number",$device_number_list['device_number']);

3. 查询多个记录某个字段 ， 并处理结果，结果是一个数组集

$where=array(
          "version_id"=>$version_id
 );
$data = model("PackageWhitelist")->where($where)->field("device_number")->select();
$device_number_list='';
foreach($data as $val){

    $list = $val->toArray();
    if($device_number_list){
        $device_number_list=$device_number_list.';'.$list["device_number"];
    }else{
        $device_number_list=$list["device_number"];
    }

}

4. 查询多条记录

$where=array(
    "version_id"=>$version_id
);
$data = model("PackageWhitelist")->where($where)->select();
$device_number_list='';
foreach($data as $val){

    $list = $val->toArray();
    if($device_number_list){
        $device_number_list=$device_number_list.';'.$list["device_number"];
    }else{
        $device_number_list=$list["device_number"];
    }

}

5. 已页形式查询，并处理结果。

public function index($version_id){
    $where=array(
        "version_id"=>$version_id
    );
    $version_name = model("Version")->where($where)->field("version_name")->find();
    $listrows=config("LISTROWS")?config("LISTROWS"):10;
    $package_lists=model("Package")->where($where)->paginate($listrows);
    $package_infos =  $package_lists->toArray()["data"];
    foreach($package_infos as $key=>$value){
        $package_infos[$key] = array("source_version" => $version_name["version_name"]) + $package_infos[$key];

    }

}