本文实例讲述了ThinkPHP5查询数据及处理结果的方法。分享给大家供大家参考,具体如下:
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
1
2
3
4
5
6
7
8
9
10
11
12
|
$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
1
|
$device_number_list = model( "PackageWhitelist" )->where( $where )->field( "device_number" )->find();
|
1
|
$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
1
2
3
4
5
6
7
8
9
10
11
12
13
|
$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
1
2
3
4
5
6
7
8
9
10
11
12
13
|
$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. 以页形式查询,并处理结果。
1
2
3
4
5
6
7
8
9
10
11
12
|
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 ];
}
}
|
再来总结一下TP5的三种查询数据库方式
方式一:原生sql查询
代码示例:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
<?php
/**
* Created by PhpStorm.
* User: chenzhitao
* Date: 2017/5/8
* Time: 下午2:15
*/
namespace app\api\model;
use think\Db;
use think\Exception;
class Banner
{
public static function getBannerByID( $id ){
$result = Db::query( 'select * from banner_item where banner_id=?' ,[ $id ]);
return $result ;
}
}
|
方式二:使用查询构建器
代码示例:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
<?php
/**
* Created by PhpStorm.
* User: chenzhitao
* Date: 2017/5/8
* Time: 下午2:15
*/
namespace app\api\model;
use think\Db;
use think\Exception;
class Banner
{
public static function getBannerByID( $id ){
//1.使用原生sql
// $result = Db::query('select * from banner_item where banner_id=?',[$id]);
// return $result;
//2.使用查询构建器
/*
* 链式查询Db::table('banner_item')->where('banner_id','=',$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 $result ;
}
}
|
方式三:ORM(Object Relation Mapping) 对象关系映射
使用ORM 查询数据库主要区别就是在写模型的继承think\model类,然后控制器就可以使用model的默认方法来获取数据而不是自己再在模型中专门写一个获取方法
代码示例:
model:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
<?php
/**
* Created by PhpStorm.
* User: chenzhitao
* Date: 2017/5/8
* Time: 下午2:15
*/
namespace app\api\model;
use think\Db;
use think\Model;
class Banner extends Model
{
// public static function getBannerByID($id){
// //1.使用原生sql
//// $result = Db::query('select * from banner_item where banner_id=?',[$id]);
//// return $result;
// //2.使用查询构建器
// /*
// * 链式查询Db::table('banner_item')->where('banner_id','=',$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;
//
//
//
//
//
// }
}
|
controller:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
<?php
/**
* Created by PhpStorm.
* User: chenzhitao
* Date: 2017/5/7
* Time: 下午1:49
*/
namespace app\api\controller\v1;
use app\api\validate\IDMustBePositiveInt;
use app\lib\exception\BannerMissException;
use app\api\model\Banner as BannerModel;
class Banner
{
public function getBanner( $id ){
//调用验证器
( new IDMustBePositiveInt())->goCheck();
// $banner = BannerModel::getBannerByID($id);
$banner = BannerModel::get( $id );
if (! $banner ){
throw new BannerMissException();
}
return $banner ;
}
}
|
希望本文所述对大家基于ThinkPHP框架的PHP程序设计有所帮助。
原文链接:http://blog.csdn.net/tww85/article/details/52880405