yii2 module类的behavior函数

原创

wx6405b2c488d4e 2023-03-07 01:19:49 博主文章分类：yii ©著作权

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之前已经说过了，函数behaviors在controller类中起的作用是进行拦截器的作用，而在Module中也是一样的

在yii2给出的例子是这样的：

/**
     * @inheritdoc
     */
    public function behaviors()
    {
        return [
            TimestampBehavior::className(),
        ];
    }

而TimestampBehavior类是这样的

class TimestampBehavior extends AttributeBehavior
{
    public $createdAtAttribute = 'created_at';
    public $updatedAtAttribute = 'updated_at';
    public $value;


    /**
     * @inheritdoc
     */
    public function init()
    {
        parent::init();

        if (empty($this->attributes)) {
            $this->attributes = [
                BaseActiveRecord::EVENT_BEFORE_INSERT => [$this->createdAtAttribute, $this->updatedAtAttribute],
                BaseActiveRecord::EVENT_BEFORE_UPDATE => $this->updatedAtAttribute,
            ];
        }
    }

   
    protected function getValue($event)
    {
        if ($this->value === null) {
            return time();
        }
        return parent::getValue($event);
    }

    public function touch($attribute)
    {
        /* @var $owner BaseActiveRecord */
        $owner = $this->owner;
        if ($owner->getIsNewRecord()) {
            throw new InvalidCallException('Updating the timestamp is not possible on a new record.');
        }
        $owner->updateAttributes(array_fill_keys((array) $attribute, $this->getValue(null)));
    }
}