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<?php |
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/** |
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* _ __ __ _____ _____ ___ ____ _____ |
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* | | / // // ___//_ _// || __||_ _| |
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* | |/ // /(__ ) / / / /| || | | | |
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* |___//_//____/ /_/ /_/ |_||_| |_| |
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* @link http://vistart.name/ |
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* @copyright Copyright (c) 2016 vistart |
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* @license http://vistart.name/license/ |
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*/ |
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namespace vistart\Models\traits; |
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use Closure; |
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use yii\base\ModelEvent; |
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use yii\behaviors\TimestampBehavior; |
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/** |
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* Entity features concerning timestamp. |
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* @property-read array $timestampBehaviors |
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* @property-read string|int createdAt |
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* @property-read string|int updatedAt |
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* @property-read array $createdAtRules |
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* @property-read array $updatedAtRules |
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* @property-read boolean isExpired |
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* @version 2.0 |
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* @author vistart <[email protected]> |
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*/ |
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trait TimestampTrait |
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{ |
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/** |
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* @var string the attribute that will receive datetime value |
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* Set this property to false if you do not want to record the creation time. |
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*/ |
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public $createdAtAttribute = 'create_time'; |
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/** |
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* @var string the attribute that will receive datetime value. |
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* Set this property to false if you do not want to record the update time. |
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*/ |
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public $updatedAtAttribute = 'update_time'; |
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/** |
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* @var integer Determine the format of timestamp. |
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*/ |
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public $timeFormat = 0; |
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public static $timeFormatDatetime = 0; |
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public static $timeFormatTimestamp = 1; |
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public static $initDatetime = '1970-01-01 00:00:00'; |
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public static $initTimestamp = 0; |
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/** |
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* @var int|false the expiration in seconds, or false if it will not be expired. |
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*/ |
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public $expiredAt = false; |
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/** |
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* @var Closure |
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*/ |
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public $expiredRemovingCallback; |
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public static $eventExpiredRemoved = 'expiredRemoved'; |
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/** |
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* Check this entity whether expired. |
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* @return boolean |
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*/ |
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public function getIsExpired() |
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{ |
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$createdAt = $this->getCreatedAt(); |
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if ($this->expiredAt === false || $createdAt === null) { |
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return false; |
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} |
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return $this->offsetDatetime($this->currentDatetime(), -$this->expiredAt) > $createdAt; |
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} |
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/** |
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* Remove myself if expired. |
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* @return boolean |
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*/ |
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public function removeIfExpired() |
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{ |
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if ($this->getIsExpired() && !$this->getIsNewRecord()) { |
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if (($this->expiredRemovingCallback instanceof Closure || is_array($this->expiredRemovingCallback)) && is_callable($this->expiredRemovingCallback)) { |
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$result = call_user_func($this->expiredRemovingCallback, $this); |
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} |
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$result = $this->delete(); |
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$this->trigger(static::$eventExpiredRemoved, new ModelEvent(['data' => ['result' => $result]])); |
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} |
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return false; |
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} |
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/** |
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* We recommened you attach this event when after finding this active record. |
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* @param ModelEvent $event |
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* @return boolean |
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*/ |
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public function onRemoveExpired($event) |
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{ |
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return $event->sender->removeIfExpired(); |
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} |
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/** |
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* Get the current date & time in format of "Y-m-d H:i:s" or timestamp. |
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* You can override this method to customize the return value. |
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* @param ModelEvent $event |
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* @return string Date & Time. |
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* @since 1.1 |
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*/ |
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public static function getCurrentDatetime($event) |
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{ |
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$sender = $event->sender; |
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return $sender->currentDatetime(); |
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} |
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/** |
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* Get current date & time, by current time format. |
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* @return string|int Date & time string if format is datetime, or timestamp. |
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*/ |
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public function currentDatetime() |
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{ |
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if ($this->timeFormat === self::$timeFormatDatetime) { |
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return date('Y-m-d H:i:s'); |
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} |
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if ($this->timeFormat === self::$timeFormatTimestamp) { |
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return time(); |
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} |
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return null; |
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} |
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/** |
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* Get offset date & time, by current time format. |
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* @param string|int $time Date &time string or timestamp. |
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* @param int $offset Offset int seconds. |
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* @return string|int Date & time string if format is datetime, or timestamp. |
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*/ |
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public function offsetDatetime($time = null, $offset = 0) |
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{ |
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if ($this->timeFormat === self::$timeFormatDatetime) { |
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return date('Y-m-d H:i:s', strtotime(($offset >= 0 ? "+$offset" : $offset) . " seconds", is_string($time) ? strtotime($time) : (is_int($time) ? $time : time()))); |
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} |
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if ($this->timeFormat === self::$timeFormatTimestamp) { |
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return (is_int($time) ? $time : time()) + $offset; |
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} |
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return null; |
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} |
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/** |
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* Get init date & time in format of "Y-m-d H:i:s" or timestamp.s |
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* @param ModelEvent $event |
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* @return string|int |
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*/ |
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public static function getInitDatetime($event) |
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{ |
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$sender = $event->sender; |
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return $sender->initDatetime(); |
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} |
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/** |
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* Get init date & time, by current time format. |
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* @return string|int Date & time string if format is datetime, or timestamp. |
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*/ |
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public function initDatetime() |
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{ |
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if ($this->timeFormat === self::$timeFormatDatetime) { |
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return static::$initDatetime; |
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} |
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if ($this->timeFormat === self::$timeFormatTimestamp) { |
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return static::$initTimestamp; |
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} |
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return null; |
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} |
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/** |
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* Check whether the attribute is init datetime. |
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* @param mixed $attribute |
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* @return boolean |
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*/ |
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protected function isInitDatetime($attribute) |
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{ |
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if ($this->timeFormat === self::$timeFormatDatetime) { |
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return $attribute == static::$initDatetime || $attribute == null; |
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} |
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if ($this->timeFormat === self::$timeFormatTimestamp) { |
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return $attribute == static::$initTimestamp || $attribute == null; |
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} |
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return false; |
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} |
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/** |
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* Get the current date & time in format of "Y-m-d H:i:s". |
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* This method is ONLY used for being triggered by event. DO NOT call, |
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* override or modify it directly, unless you know the consequences. |
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* @param ModelEvent $event |
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* @return string Date & Time. |
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* @since 1.1 |
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*/ |
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public function onUpdateCurrentDatetime($event) |
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{ |
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return self::getCurrentDatetime($event); |
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} |
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/** |
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* Behaviors associated with timestamp. |
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* @return array behaviors |
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*/ |
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public function getTimestampBehaviors() |
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{ |
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return [ |
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[ |
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'class' => TimestampBehavior::className(), |
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'createdAtAttribute' => $this->createdAtAttribute, |
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'updatedAtAttribute' => $this->updatedAtAttribute, |
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'value' => [$this, 'onUpdateCurrentDatetime'], |
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] |
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]; |
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} |
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/** |
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* Get createdAt. |
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* @return string timestamp |
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*/ |
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public function getCreatedAt() |
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{ |
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$createdAtAttribute = $this->createdAtAttribute; |
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if (!is_string($createdAtAttribute)) { |
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return null; |
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} |
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return $this->$createdAtAttribute; |
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} |
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/** |
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* Get rules associated with createdAtAttribute. |
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* @return array rules |
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*/ |
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public function getCreatedAtRules() |
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{ |
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if (!$this->createdAtAttribute) { |
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return []; |
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} |
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return [ |
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[[$this->createdAtAttribute], 'safe'], |
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]; |
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} |
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/** |
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* Get updatedAt. |
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* @return string timestamp |
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*/ |
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public function getUpdatedAt() |
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{ |
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$updatedAtAttribute = $this->updatedAtAttribute; |
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if (!is_string($updatedAtAttribute)) { |
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return null; |
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} |
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return $this->$updatedAtAttribute; |
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} |
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/** |
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* Get rules associated with updatedAtAttribute. |
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* @return array rules |
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*/ |
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public function getUpdatedAtRules() |
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{ |
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if (!$this->updatedAtAttribute) { |
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return []; |
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} |
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return [ |
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[[$this->updatedAtAttribute], 'safe'], |
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]; |
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} |
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public function enabledTimestampFields() |
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{ |
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$fields = []; |
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if (is_string($this->createdAtAttribute)) { |
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$fields[] = $this->createdAtAttribute; |
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} |
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if (is_string($this->updatedAtAttribute)) { |
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$fields[] = $this->updatedAtAttribute; |
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} |
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return $fields; |
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} |
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} |
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This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.