Yii2 handle beforesave event in behaviour - php

Question

i try to develop application with yii2 framework,i use beforeSave event to handle createdAt and updatedAt with time() function, this method is :
public function beforeSave($insert)
{
if ($insert) {
$this->createdAt = time();
}
$this->updatedAt = time();
return parent::beforeSave($insert);
}
i just wanna move this method to behaviour and attach it to my model, i create the behaviour class and attach the behaviour to model but it does not work abd pass null to database, my behaviour class is :
namespace app\modules\imdb\behaviors;
use yii\base\Behavior;
use yii\db\ActiveRecord;
class saveTimeBehavior extends Behavior
{
public function events()
{
return [
ActiveRecord::EVENT_BEFORE_INSERT => 'beforeSave',
];
}
public function beforeSave($event)
{
if ($event) {
$this->createdAt = time();
}
$this->updatedAt = time();
return parent::beforeSave($event);
}
}
and the attach code in my model is :
public function behaviors()
{
return [
saveTimeBehavior::className(),
];
}
please help me to handle this with correct way, thanks alot :)

Answer 1

You can do this with TimeStampBehavior. If you have declared the columns(created_at, updated_at) as int(11) for being UNIX timestamp.
use yii\behaviors\TimestampBehavior;
public function behaviors()
{
return [
TimestampBehavior::className(),
];
}
But as your attribute names are different or you want to use a different way of calculating the timestamp, you may configure the $createdAtAttribute, $updatedAtAttribute and $value properties like the following:
use yii\db\Expression;
use yii\behaviors\TimestampBehavior;
public function behaviors()
{
return [
[
'class' => TimestampBehavior::className(),
'createdAtAttribute' => 'createdAt',
'updatedAtAttribute' => 'updatedAt',
'value' => new Expression('NOW()'),
],
];
}

Answer 2

Uou can do that in a simple way , by identify the type of created_at and updated_at as timestamp when you create the table, and it will be automatically filled in the database when you add new record or update existing one.
Example :
'created_at'=> $this->timestamp(),
'updated_at'=> $this->timestamp(),
Note: You can find more information about creating table using the below link : Yii2 Migration