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111 lines
3.5 KiB
111 lines
3.5 KiB
<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\behaviors; |
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use yii\db\BaseActiveRecord; |
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use yii\db\Expression; |
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/** |
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* TimestampBehavior automatically fills the specified attributes with the current timestamp. |
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* |
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* To use TimestampBehavior, simply insert the following code to your ActiveRecord class: |
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* |
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* ```php |
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* use yii\behaviors\TimestampBehavior; |
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* |
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* public function behaviors() |
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* { |
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* return [ |
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* TimestampBehavior::className(), |
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* ]; |
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* } |
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* ``` |
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* |
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* By default, TimestampBehavior will fill the `created_at` and `updated_at` attributes with the current timestamp |
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* when the associated AR object is being inserted; it will fill the `updated_at` attribute |
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* with the timestamp when the AR object is being updated. The timestamp value is obtained by `time()`. |
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* |
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* If your attribute names are different or you want to use a different way of calculating the timestamp, |
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* you may configure the [[attributes]] and [[value]] properties like the following: |
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* |
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* ```php |
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* use yii\db\Expression; |
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* |
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* public function behaviors() |
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* { |
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* return [ |
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* 'timestamp' => [ |
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* 'class' => TimestampBehavior::className(), |
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* 'attributes' => [ |
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* ActiveRecord::EVENT_BEFORE_INSERT => 'creation_time', |
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* ActiveRecord::EVENT_BEFORE_UPDATE => 'update_time', |
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* ], |
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* 'value' => new Expression('NOW()'), |
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* ], |
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* ]; |
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* } |
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* ``` |
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* |
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* TimestampBehavior also provides a method named [[touch()]] that allows you to assign the current |
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* timestamp to the specified attribute(s) and save them to the database. For example, |
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* |
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* ```php |
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* $this->timestamp->touch('creation_time'); |
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* ``` |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @since 2.0 |
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*/ |
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class TimestampBehavior extends AttributeBehavior |
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{ |
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/** |
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* @var array list of attributes that are to be automatically filled with timestamps. |
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* The array keys are the ActiveRecord events upon which the attributes are to be filled with timestamps, |
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* and the array values are the corresponding attribute(s) to be updated. You can use a string to represent |
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* a single attribute, or an array to represent a list of attributes. |
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* The default setting is to update both of the `created_at` and `updated_at` attributes upon AR insertion, |
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* and update the `updated_at` attribute upon AR updating. |
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*/ |
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public $attributes = [ |
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BaseActiveRecord::EVENT_BEFORE_INSERT => ['created_at', 'updated_at'], |
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BaseActiveRecord::EVENT_BEFORE_UPDATE => 'updated_at', |
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]; |
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/** |
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* @var callable|Expression The expression that will be used for generating the timestamp. |
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* This can be either an anonymous function that returns the timestamp value, |
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* or an [[Expression]] object representing a DB expression (e.g. `new Expression('NOW()')`). |
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* If not set, it will use the value of `time()` to set the attributes. |
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*/ |
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public $value; |
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/** |
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* @inheritdoc |
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*/ |
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protected function getValue($event) |
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{ |
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if ($this->value instanceof Expression) { |
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return $this->value; |
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} else { |
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return $this->value !== null ? call_user_func($this->value, $event) : time(); |
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} |
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} |
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/** |
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* Updates a timestamp attribute to the current timestamp. |
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* |
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* ```php |
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* $model->touch('lastVisit'); |
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* ``` |
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* @param string $attribute the name of the attribute to update. |
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*/ |
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public function touch($attribute) |
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{ |
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$this->owner->updateAttributes(array_fill_keys((array)$attribute, $this->getValue(null))); |
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} |
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}
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