README

implementation pattern design "lazy load" for components of yii2

Installation

The preferred way to install this extension is through composer.

Either run

php composer.phar require --prefer-dist iluhansk/yii2-lazy "*"

or add

"iluhansk/yii2-lazy": "*"

to the require section of your composer.json file.

Usage

Add LazyBehavior to target class and define methods corresponding lazy properties:

namespace common\components;

use \yii\base\Component;
use iluhansk\renderer\LazyBehavior;

/**
 * @property int $passengersCount Count of passengers in the car
 */
class Car extends Component {

    public function behaviors() {
        return [
            'lazy' => [
                'class' => LazyBehavior::className()
            ],
        ];
    }

    public function lazy_passengersCount() {
        //some logic here, for example:
        return rand(1,4);
    }

}

And use lazy property in any place:

use common\components\Car;

echo "PassengersCount first call: $o->passengersCount
"; //first use lazy property will call lazy_passengersCount method of object
echo "PassengersCount second call: $o->passengersCount
"; //this will return stored value (and not call lazy_passengersCount method again)