public function __construct(Product $product, Attribute $attribute, AttributeValue $attributeValue)
{
$this->setId();
$this->setCreated();
$this->product = $product;
$this->attribute = $attribute;
$this->attributeValue = $attributeValue;
$product->addProductAttribute($this);
$attribute->addProductAttribute($this);
$attributeValue->addProductAttribute($this);
}