Examples to explain how to use models in the ThinkPHP framework

ThinkPHP is an excellent PHP development framework and is deeply loved by PHP developers. In the ThinkPHP framework, the model is one of the core and is also a frequently used part in database operations. The model abstracts database operations, making it easier and more convenient to operate the database.

This article will explain how to use models in the ThinkPHP framework.

1. Define the model

In the ThinkPHP framework, you can define a model by inheriting the Think\Model class.

namespace app\model;

use think\Model;

class UserModel extends Model
{
    //
}

The above is the code to define a simple user model. Among them, UserModel inherits from Think\Model class, indicating that this class is a model. We can define some methods in this class, for example:

public function getUserByName($name)
{
    return $this->where('name', $name)->find();
}

2. Using the model in the controller

To use the model in the controller, you need to instantiate the model first, and then You can call the defined method through the model.

namespace app\controller;

use app\model\UserModel;
use think\Controller;

class UserController extends Controller
{
    public function getUserByName($name)
    {
        $userModel = new UserModel();
        $user = $userModel->getUserByName($name);
        return json($user);
    }
}

The above is using the model in the controller. We first introduce the UserModel class, then instantiate this class and call the getUserByName method.

3. Data table association of the model

In the ThinkPHP framework, the model supports data table association, which is very common in development. For example, we can define an Order model and a User model, where the Order model is associated with a user, and the code is as follows:

class Order extends Model
{
    public function user()
    {
        return $this->belongsTo('User');
    }
}

The above is the code to define the Order model, where the user method indicates that the Order model belongs to a User model.

If we want to query the user information of an order, we can easily achieve it through model association:

$order = Order::get($id);
$user = $order->user;

The above code will return the user information of the order.

4. Automatic completion and verification of models

In the ThinkPHP framework, models support automatic completion and verification. For example, we can add an auto-complete field to the User model:

class UserModel extends Model
{
    protected $auto = ['password'];

    protected function setPasswordAttr($value)
    {
        return md5($value);
    }
}

The above code indicates that when writing data, if the password field is passed in, it will be automatically converted into md5-encrypted characters. string.

If you need to verify data, you can add a validate method to the model:

class UserModel extends Model
{
    public function validateUser($data)
    {
        $rule = [
            'name' => 'require|unique:user',
            'email' => 'require|email|unique:user',
            'password' => 'require|min:6'
        ];

        $message = [
            'name.require' => '用户名不能为空',
            'name.unique' => '用户名已存在',
            'email.require' => '邮箱不能为空',
            'email.email' => '邮箱格式不正确',
            'email.unique' => '邮箱已存在',
            'password.require' => '密码不能为空',
            'password.min' => '密码长度不能小于6位'
        ];

        $validate = new Validate($rule, $message);
        return $validate->check($data);
    }
}

In the above code, we define a validateUser method to verify user registration information. Rules and error messages are defined. Call this method in the Controller to achieve verification.

The above is how to use the model in the ThinkPHP framework. The model is a very commonly used part. Mastering how to use the model will make database operations and data processing more convenient.

The above is the detailed content of Examples to explain how to use models in the ThinkPHP framework. For more information, please follow other related articles on the PHP Chinese website!