/**
* @return \yii\db\ActiveQuery
*/
public function getProductGroups()
{
return $this->hasMany(ProductGroupBase::className(), ['product_category_id' => 'id']);
}
/**
* @return \yii\db\ActiveQuery
*/
public function getProductGroup()
{
return $this->hasOne(ProductGroupBase::className(), ['id' => 'product_group_id']);
}