从头开始学习yii2---5.完善注册接口

关于模型，yii2中有两种模型，一种是model，一种是form类型。不同地方是，form可能有一些表单的独特的字段，如验证码等这些不会被保存到数据库的东西。model是一个对于数据库的映射，form是对input框的映射。
这次我们以frontend/models/SignupForm.php这个路径为例子，增加确认密码和验证码字段。

关于这个主要涉及到一个form类型的模型和视图，frontend/models/SignupForm.php，一些限制都写在rule里面。
几个关键字 unique（唯一），match（正则），captcha（验证码），compare（比较），filter（过滤，可以加trim），具体使用方法可以参考下面这个form

<?php
namespace frontend\models;

use common\models\User;
use yii\base\Model;
use Yii;

/**
 * Signup form
 */
class SignupForm extends Model
{
public $username;
public $email;
public $password;
public $rePassword;
public $verifyCode;

/**
 * @inheritdoc
 */
public function rules()
 {
return [
//写属性的验证规则
 ['username', 'filter', 'filter' => 'trim'],
 ['username', 'required'],
 ['username', 'unique', 'targetClass' => '\common\models\User', 'message' => 'This username has already been taken.'], //检测唯一性 这里是展示用户名的唯一性 targetClass这个是调用数据库模型
 ['username', 'string', 'min' => 2, 'max' => 16],
//正则匹配的写法 是match关键字
// ['username', 'match', 'pattern' => '/^[(\x{4E00}-\x{9FA5})a-zA-Z]+[(\x{4E00}-\x{9FA5})a-zA-Z_\d]8$/u','message' => '用户名由字母，汉字，数字，下划线组成，且不能以数字和下划线开头'],

 ['email', 'filter', 'filter' => 'trim'],
 ['email', 'required'],
 ['email', 'email'],
 ['email', 'string', 'max' => 16],
 ['email', 'unique', 'targetClass' => '\common\models\User', 'message' => 'This email address has already been taken.'],

 [['password', 'rePassword'], 'required'],
 [['password', 'rePassword'], 'string', 'min' => 6],
 ['verifyCode', 'captcha'],//验证码有专门的属性

//比较密码和确认密码是否一致 用compare关键字
 ['rePassword','compare', 'compareAttribute' => 'password', 'message' => '两次输入的密码不一致']
 ];
 }

public function attributeLabels()
 {
//这个主要用于这些form表单的字段对应的label的配置
return [
'username' => '用户名',
'email' => '邮箱',
'password' => '密码',
'rePassword' => '重置密码',
'verifyCode' => '验证码',
 ];
 }

/**
 * Signs user up.
 *
 * @return User|null the saved model or null if saving fails
 */
public function signup()
 {
if ($this->validate()) {
$user = new User();
$user->username = $this->username;
$user->email = $this->email;
$user->setPassword($this->password);
$user->generateAuthKey();
if ($user->save()) {
return $user;
 }
 }

return null;
 }
}

对应的视图文件frontend/views/site/signup.php

<?php

/* @var $this yii\web\View */
/* @var $form yii\bootstrap\ActiveForm */
/* @var $model \frontend\models\SignupForm */

use yii\helpers\Html;
use yii\bootstrap\ActiveForm;
use \yii\captcha\Captcha;

$this->title = 'Signup';
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="site-signup">
<h1><?= Html::encode($this->title) ?></h1>

<p>Please fill out the following fields to signup:</p>

<div class="row">
<div class="col-lg-5">
<?php $form = ActiveForm::begin(['id' => 'form-signup']); ?>

<?= $form->field($model, 'username') ?>

<?= $form->field($model, 'email') ?>

<?= $form->field($model, 'password')->passwordInput() ?>

<?= $form->field($model, 'rePassword')->passwordInput() ?>

<?= $form->field($model, 'verifyCode')->widget(Captcha::className()) ?>//验证码

<div class="form-group">
<?= Html::submitButton('Signup', ['class' => 'btn btn-primary', 'name' => 'signup-button']) ?>
</div>

<?php ActiveForm::end(); ?>
</div>
</div>
</div>