protected function updateCogs($params)
{
$cogs = Cogs::findOne(['product_id' => $params['id']]);
if (!$cogs) {
$cogs = new Cogs(['product_id' => $params['id'], 'cogs' => 0.0]);
}
$current_stock = ProductStock::find()->where(['product_id' => $params['id']])->sum('qty');
if ($current_stock != 0) {
$cogs->cogs += $params['qty'] * ($params['cogs'] - $cogs->cogs) / $current_stock;
} else {
$cogs->cogs = 0;
}
return $cogs->save(false);
}
/**
* @return \yii\db\ActiveQuery
*/
public function getProductStocks()
{
return $this->hasMany(ProductStock::className(), ['product_id' => 'id']);
}