Home > PHP Framework > ThinkPHP > body text

How to query and process data in ThinkPHP5 framework

藏色散人
Release: 2021-12-23 16:33:33
forward
2596 people have browsed it

The following thinkphp framework tutorial column will introduce to you how to query and process data in the ThinkPHP5 framework. I hope it will be helpful to friends in need!

I encountered some problems when processing database query results. Record the several query methods and result processing used.

1. Query a certain record

$where=array(
  "version_id"=>$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']);
}
Copy after login

2. Query a certain field of a certain record

$device_number_list = model("PackageWhitelist")->where($where)->field("device_number")->find();
Copy after login
$this->assign("device_number",$device_number_list['device_number']);
Copy after login

3. Query a certain field of multiple records and process the results. It is an array set

$where=array(
     "version_id"=>$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"];
  }
}
Copy after login

4. Query multiple records

$where=array(
  "version_id"=>$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"];
  }
}
Copy after login

5. Query in page form and process the results.

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];
  }
}
Copy after login

Let’s summarize the three ways of querying the database in TP5

Method 1: Native sql query

Code sample:

Copy after login

Method 2: Use query Builder

Code example:

where('banner_id','=',$id) 返回查询对象,->select();返回查询结果,
     * 除了select操作还有 find(返回一条数据) update delete insert
     * 对应的where 也分三种,1.表达式where('字段名','表达式','查询条件') 2.数组发 3.闭包。
     */
    // 2.1 表达式法
//    $result = Db::table('banner_item')
//      ->where('banner_id','=',$id)
//      ->select();
//    return $result;
    //2.2 闭包法
    $result = Db::table('banner_item')
      ->where(function ($query) use($id){
        $query->where('banner_id','=',$id);
      })
      ->select();
    return $result;
  }
}
Copy after login

Method three: ORM (Object Relation Mapping) Object relational mapping

The main difference in using ORM to query the database is the inheritance of writing model think\ model class, then the controller can use the default method of the model to obtain the data instead of writing a special acquisition method in the model

Code example:

model:

where('banner_id','=',$id) 返回查询对象,->select();返回查询结果,
//     * 除了select操作还有 find(返回一条数据) update delete insert
//     * 对应的where 也分三种,1.表达式where('字段名','表达式','查询条件') 2.数组发 3.闭包。
//     */
//
//    // 2.1 表达式法
////    $result = Db::table('banner_item')
////      ->where('banner_id','=',$id)
////      ->select();
////    return $result;
//    //2.2 闭包法
//    $result = Db::table('banner_item')
//      ->where(function ($query) use($id){
//        $query->where('banner_id','=',$id);
//
//      })
//      ->select();
//    return $result;
//
//
//
//
//
//  }
}
Copy after login

controller:

goCheck();
//    $banner = BannerModel::getBannerByID($id);
    $banner = BannerModel::get($id);
    if(!$banner){
      throw new BannerMissException();
    }
    return $banner;
  }
}
Copy after login

The above is the detailed content of How to query and process data in ThinkPHP5 framework. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:jb51.net
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact [email protected]
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!