Class yii\behaviors\TimestampBehavior

Inheritanceyii\behaviors\TimestampBehavior » yii\behaviors\AttributeBehavior » yii\base\Behavior » yii\base\Object
Implementsyii\base\Configurable
Available since version2.0
Source Code https://github.com/yiisoft/yii2/blob/master/framework/behaviors/TimestampBehavior.php

TimestampBehavior automatically fills the specified attributes with the current timestamp.

To use TimestampBehavior, insert the following code to your ActiveRecord class:

use yii\behaviors\TimestampBehavior;

public function behaviors()
{
    return [
        TimestampBehavior::className(),
    ];
}

By default, TimestampBehavior will fill the created_at and updated_at attributes with the current timestamp when the associated AR object is being inserted; it will fill the updated_at attribute with the timestamp when the AR object is being updated. The timestamp value is obtained by time().

Because attribute values will be set automatically by this behavior, they are usually not user input and should therefore not be validated, i.e. created_at and updated_at should not appear in the rules() method of the model.

For the above implementation to work with MySQL database, please declare the columns(created_at, updated_at) as int(11) for being UNIX timestamp.

If 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;

public function behaviors()
{
    return [
        [
            'class' => TimestampBehavior::className(),
            'createdAtAttribute' => 'create_time',
            'updatedAtAttribute' => 'update_time',
            'value' => new Expression('NOW()'),
        ],
    ];
}

In case you use an yii\db\Expression object as in the example above, the attribute will not hold the timestamp value, but the Expression object itself after the record has been saved. If you need the value from DB afterwards you should call the refresh() method of the record.

TimestampBehavior also provides a method named touch() that allows you to assign the current timestamp to the specified attribute(s) and save them to the database. For example,

$model->touch('creation_time');

Public Properties

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PropertyTypeDescriptionDefined By
$attributes array List of attributes that are to be automatically filled with the value specified via $value. yii\behaviors\AttributeBehavior
$createdAtAttribute string The attribute that will receive timestamp value Set this property to false if you do not want to record the creation time. yii\behaviors\TimestampBehavior
$owner yii\base\Component The owner of this behavior yii\base\Behavior
$skipUpdateOnClean boolean Whether to skip this behavior when the $owner has not been modified yii\behaviors\AttributeBehavior
$updatedAtAttribute string The attribute that will receive timestamp value. yii\behaviors\TimestampBehavior
$value mixed The value that will be assigned to the current attributes. yii\behaviors\TimestampBehavior

Public Methods

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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. yii\base\Object
__construct() Constructor. yii\base\Object
__get() Returns the value of an object property. yii\base\Object
__isset() Checks if a property is set, i.e. defined and not null. yii\base\Object
__set() Sets value of an object property. yii\base\Object
__unset() Sets an object property to null. yii\base\Object
attach() Attaches the behavior object to the component. yii\base\Behavior
canGetProperty() Returns a value indicating whether a property can be read. yii\base\Object
canSetProperty() Returns a value indicating whether a property can be set. yii\base\Object
className() Returns the fully qualified name of this class. yii\base\Object
detach() Detaches the behavior object from the component. yii\base\Behavior
evaluateAttributes() Evaluates the attribute value and assigns it to the current attributes. yii\behaviors\AttributeBehavior
events() Declares event handlers for the $owner's events. yii\behaviors\AttributeBehavior
hasMethod() Returns a value indicating whether a method is defined. yii\base\Object
hasProperty() Returns a value indicating whether a property is defined. yii\base\Object
init() Initializes the object. yii\behaviors\TimestampBehavior
touch() Updates a timestamp attribute to the current timestamp. yii\behaviors\TimestampBehavior

Protected Methods

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MethodDescriptionDefined By
getValue() Returns the value for the current attributes. yii\behaviors\TimestampBehavior

Property Details

$createdAtAttribute public property

The attribute that will receive timestamp value Set this property to false if you do not want to record the creation time.

public string $createdAtAttribute 'created_at'
$updatedAtAttribute public property

The attribute that will receive timestamp value. Set this property to false if you do not want to record the update time.

public string $updatedAtAttribute 'updated_at'
$value public property

The value that will be assigned to the current attributes. This can be an anonymous function, callable in array format (e.g. [$this, 'methodName']), an Expression object representing a DB expression (e.g. new Expression('NOW()')), scalar, string or an arbitrary value. If the former, the return value of the function will be assigned to the attributes. The signature of the function should be as follows,

function ($event)
{
    // return value will be assigned to the attribute
}

In case, when the value is null, the result of the PHP function time() will be used as value.

public mixed $value null

Method Details

getValue() protected method

Returns the value for the current attributes.

This method is called by evaluateAttributes(). Its return value will be assigned to the attributes corresponding to the triggering event.

In case, when the $value is null, the result of the PHP function time() will be used as value.

protected mixed getValue ( $event )
$event yii\base\Event

The event that triggers the current attribute updating.

return mixed

The attribute value

init() public method

Initializes the object.

This method is invoked at the end of the constructor after the object is initialized with the given configuration.

public void init ( )
touch() public method

Updates a timestamp attribute to the current timestamp.

$model->touch('lastVisit');
public void touch ( $attribute )
$attribute string

The name of the attribute to update.

throws yii\base\InvalidCallException

if owner is a new record (since version 2.0.6).