yii2 - SQLSTATE[23000]: Integrity constraint violation: 1048 - php

Question

I'm new to yii2, I'm trying to send a request to the database, but it comes out that such columns cannot be null, although when checking through #var_dump I can see the sending data, what is the matter and how to fix it
---> Controller
public function actionSignup()
{
$model = new Signup();
if (isset($_POST['Signup'])) {
$model->attributes = Yii::$app->request->post('Signup');
if ($model->validate()) {
$model->signup();
# code...
}
}
return $this->render('signup', ['model'=>$model]);
---> View page
<?php
use \yii\widgets\ActiveForm;
?>
<?php
$form = ActiveForm::begin(['class'=>'form-horizontal']);
?>
<?= $form->field($model,'email')->textInput(['autofocus'=>true]) ?>
<?= $form->field($model,'password')->passwordInput() ?>
<div>
<button type="submit" class="btn primary-btn">Submit</button>
</div>
<?php
ActiveForm::end();
?>
---> Model
class Signup extends Model
{
public $email;
public $password;
public function reles()
{
return [
[['email', 'password'], 'required'],
['email', 'email'],
['email', 'unique', 'targetClass'=>'app\models\User'],
['password', 'string', 'min'=>2,'max'=>10]
];
}
public function signup()
{
$user = new User();
$user->email = $this->email;
$user->password = $this->password;
return $user->save();
}
---> phpmyadmin database
namespace app\models;
use yii\db\ActiveRecord;
class User extends ActiveRecord
{
}
--> var_dump
--> sql

Answer 1

Try this:
**
* Signs user up.
*
* #return mixed
*/
public function actionSignup()
{
$model = new SignupForm()
//Sign up if it is post request
if ($model->load(Yii::$app->request->post()) && $model->signup()) { //Here YOU LOAD your POST data in to the Lodal using load() method.
Yii::$app->session->setFlash('success', 'Thank you for registration. Please check your email for further instructions.', false);
return $this->goHome();
} else {
Yii::$app->session->setFlash('success', 'Sorry, you can not register right now.', false);
return $this->redirect('/login');
}
}

Answer 2

In Model
First of all, the method for attribute rules is called "rules" I don't know if it's a typo from you in the question or this is the problem; If there are no rules for user input data the returned values will be NULL, I have faced this issue before, I didn't include a rules() method (or in your case it's name is not correct) and the model returned null for attribute values. Your code have to be:
public function rules()
{
return [
[['email', 'password'], 'required'],
['email', 'email'],
['email', 'unique', 'targetClass'=>'app\models\User'],
['password', 'string', 'min'=>2,'max'=>10]
];
}
Technical note: normally, or based upon my understanding a password should have a minimum of 8 not 2 characters, if the password entered is only 2 characters it can be brute-forced in a second.
In Controller
As in #Serghei Leonenco's Answer, Yii2 already provides some functions to use to handle post requests and so, so please stick to Yii2 functions it can enhance your app security
So in the actionSignup() method the code ought to be
public function actionSignup()
{
$model = new Signup();
// Loads the post request directly onto the model and validates it against the model rules() method
if($model->load(Yii::$app->request->post()) && $model->validate){
$model->signup();
// Model validated and saved successfully, IT OUGHT TO BE SAVED IN THE DATABASE AT THIS POINT
// Here you can set a flash or redirect the user to another page
}
return $this->render('signup', ['model'=>$model]);
}
In View
At last, in your view code it's better to use Yii2 internal functions for Html buttons
<?= Html::submitButton('Signup', ['class' => 'btn btn-primary']) ?>
Of course don't forget to use yii\helpers\Html
use yii\helpers\Html;