/**
  * @return array
  */
 public function resolveAttributeColumns()
 {
     if (empty($this->attributesFields)) {
         $attributes = $this->attributeRepository->findAll();
         $currencyCodes = $this->currencyRepository->getActivatedCurrencyCodes();
         $values = $this->valuesResolver->resolveEligibleValues($attributes);
         foreach ($values as $value) {
             if (null !== $value['locale'] && null !== $value['scope']) {
                 $field = sprintf('%s-%s-%s', $value['attribute'], $value['locale'], $value['scope']);
             } elseif (null !== $value['locale']) {
                 $field = sprintf('%s-%s', $value['attribute'], $value['locale']);
             } elseif (null !== $value['scope']) {
                 $field = sprintf('%s-%s', $value['attribute'], $value['scope']);
             } else {
                 $field = $value['attribute'];
             }
             if (AttributeTypes::PRICE_COLLECTION === $value['type']) {
                 $this->attributesFields[] = $field;
                 foreach ($currencyCodes as $currencyCode) {
                     $currencyField = sprintf('%s-%s', $field, $currencyCode);
                     $this->attributesFields[] = $currencyField;
                 }
             } elseif (AttributeTypes::METRIC === $value['type']) {
                 $this->attributesFields[] = $field;
                 $metricField = sprintf('%s-%s', $field, 'unit');
                 $this->attributesFields[] = $metricField;
             } else {
                 $this->attributesFields[] = $field;
             }
         }
     }
     return $this->attributesFields;
 }
 /**
  * {@inheritdoc}
  */
 public function addAttributeToProduct(ProductInterface $product, AttributeInterface $attribute)
 {
     $requiredValues = $this->valuesResolver->resolveEligibleValues([$attribute]);
     foreach ($requiredValues as $value) {
         $this->addProductValue($product, $attribute, $value['locale'], $value['scope']);
     }
 }