Model operations in thinkphp

Create a new model

There are two methods:

One is to create it manually

1. Create a new model folder

2. Create a new file user.php. It is best that the name corresponds to the table name

3. Write the code

<?php
namespace app\index\model;
use think\Model;
class User extends Model
{
//如果表名和文件名不是对应的，用下面代码修改
protected $table = &#39;think_user&#39;;
    }

The second is to use the command:

>php think make:model index/Blog

Model instantiation

There are three ways:

1. Use static method

use app\index\model\User;
 $li= User::get(1);

2. Use loading class

use think\Loader;
$user= Loader::model('user');
 $li= $user::get(1);

3. Use system method

$user= model('User');
 $li= $user::get(1);

Query operation of database

get means to query the data whose primary key is 1. The following is to query the data of name=thinkphp

//取出主键为1的数据
$user = User::get(1);
// 使用数组查询
$user = User::get(['name' => 'thinkphp']);

You can also use the system query method

$user = new User();
$user->where('name', 'thinkphp')->find();

To query multiple pieces of data

Use the all() method

// 根据主键获取多个数据
$list = User::all('1,2,3');
// 或者使用数组
$list = User::all([1,2,3]);
foreach($list as $key=>$user){
    echo $user->name;
}
// 使用数组查询
$list = User::all(['status'=>1]);
// 使用闭包查询
$list = User::all(function($query){
    $query->where('status', 1)->limit(3)->order('id', 'asc');
});
foreach($list as $key=>$user){
    echo $user->name;
}

Or use the query method to view

$user = new User();
// 查询数据集
$user->where('name', 'thinkphp')
    ->limit(10)
    ->order('id', 'desc')
    ->select();

Query a certain field value

// 获取某个用户的积分
User::where('id',10)->value('score');
// 获取某个列的所有值
User::where('status',1)->column('name');
// 以id为索引
User::where('status',1)->column('name','id');
User::where('status',1)->column('id,name');

You can also use dynamic query

// 根据name字段查询用户
$user = User::getByName('thinkphp');
// 根据email字段查询用户
$user = User::getByEmail('thinkphp@qq.com');

New data

Use save method

$user           = new User;
$user->name     = 'thinkphp';
$user->email    = 'thinkphp@qq.com';
$user->save();

Use data batch method to save

$user = new User;
$user->data([
    'name'  =>  'thinkphp',
    'email' =>  'thinkphp@qq.com'
]);
$user->save();

The most commonly used is to import post or get data during instantiation, and then save it##I am I feel it is more important here

//如果需要过滤非数据表字段的数据，可以使用：
$user = new User($_POST);
// 过滤post数组中的非数据表字段数据
$user->allowField(true)->save();

//如果你通过外部提交赋值给模型，并且希望指定某些字段写入，可以使用：
$user = new User($_POST);
// post数组中只有name和email字段会写入
$user->allowField(['name','email'])->save();

Get the inserted data id

$user           = new User;
$user->name     = 'thinkphp';
$user->email    = 'thinkphp@qq.com';
$user->save();
// 获取自增ID
echo $user->user_id;

Insert multiple pieces of data

$user = new User;
$list = [
    ['name'=>'thinkphp','email'=>'thinkphp@qq.com'],
    ['name'=>'onethink','email'=>'onethink@qq.com']
];
$user->saveAll($list);

You can also use the assistant function

// 使用model助手函数实例化User模型
$user = model('User');
// 模型对象赋值
$user->data([
    'name'  =>  'thinkphp',
    'email' =>  'thinkphp@qq.com'
]);
$user->save();

或者进行批量新增：
$user = model('User');
// 批量新增
$list = [
    ['name'=>'thinkphp','email'=>'thinkphp@qq.com'],
    ['name'=>'onethink','email'=>'onethink@qq.com']
];
$user->saveAll($list);

Data deletion , need to query first, then delete

Delete one item

$user = User::get(1);
$user->delete();

Delete multiple items

User::destroy(1);
// 支持批量删除多个数据
User::destroy('1,2,3');
// 或者
User::destroy([1,2,3]);

Delete according to conditions

// 删除状态为0的数据
User::destroy(['status' => 0]);

还支持使用闭包删除，例如：
User::destroy(function($query){
    $query->where('id','>',10);
});

或者通过数据库类的查询条件删除
User::where('id','>',10)->delete();

Data update , need to query first, and then update

$user = User::get(1);
$user->name     = 'thinkphp';
$user->email    = 'thinkphp@qq.com';
$user->save();

Update according to conditions

$user = new User;
// save方法第二个参数为更新条件
$user->save([
    'name'  => 'thinkphp',
    'email' => 'thinkphp@qq.com'
],['id' => 1]);

Post submission direct update

$user = new User();
// 过滤post数组中的非数据表字段数据
$user->allowField(true)->save($_POST,['id' => 1]);

//如果你通过外部提交赋值给模型，并且希望指定某些字段写入，可以使用：
$user = new User();
// post数组中只有name和email字段会写入
$user->allowField(['name','email'])->save($_POST, ['id' => 1]);

Forced update to prevent adding

$user = new User;
$list = [
    ['id'=>1, 'name'=>'thinkphp', 'email'=>'thinkphp@qq.com'],
    ['id'=>2, 'name'=>'onethink', 'email'=>'onethink@qq.com']
];
$user->isUpdate()->saveAll($list);

Use database class to add

$user = new User;
$user->where('id', 1)
    ->update(['name' => 'thinkphp']);
或者使用：
$user = new User;
$user->update(['id' => 1, 'name' => 'thinkphp']);

Recommended tutorial: "TP5"

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