Special price vigency for configurable childs (simple products associated) doesn´t work

[valenciaisaza]

Special price vigency for configurable child´s (simple products associated) doesn´t work

Preconditions

1. Magento 2.1.2
2. PHP 7.0.11

Steps to reproduce

1. Create configurable product (I created a color-configurable).
2. Create his childs with different colors.
3. Assign a Special price for one of teh simple´s, with the lower price of all.
4. Put the vigency with both dates in past.

Expected result

1. The Configurable price in the catalog and the product page is the lowest actual price (having the validity in consideration)

Actual result

1. Shown the special price expired (because is the lowest)
   

[valenciaisaza]

I don´t know if it helps

Searching in the code I found that in the \Magento\Catalog\Pricing\Price\SpecialPrice Class when the method "isScopeDateInInterval" is called by a simple product, the product has the Special price dates. But when the same method is called for a simple child of a configurable product, the product don't have this dates, so tha validation fails

    public function isScopeDateInInterval()
    {
        return $this->localeDate->isScopeDateInInterval(
            $this->product->getStore(),
            $this->getSpecialFromDate(),
            $this->getSpecialToDate()
        );
    }

[valenciaisaza]

I´m here one more time

I found the problem in this class: vendor\magento\module-configurable-product\Pricing\Price\ConfigurableOptionsProvider.php

In the method "getProducts"

Original method

public function getProducts(ProductInterface $product)
    {
        if (!isset($this->products[$product->getId()])) {
            if ($this->requestSafety->isSafeMethod()) {
                $productIds = $this->resource->getConnection()->fetchCol(
                    '(' . implode(') UNION (', $this->linkedProductSelectBuilder->build($product->getId())) . ')'
                );

                $this->products[$product->getId()] = $this->collectionFactory->create()
                    ->addAttributeToSelect(['price', 'special_price'])
                    ->addIdFilter($productIds);
            } else {
                $this->products[$product->getId()] = $this->configurable->getUsedProducts($product);
            }
        }
        return $this->products[$product->getId()];
    }

Modified method

public function getProducts(ProductInterface $product)
    {
        if (!isset($this->products[$product->getId()])) {
            if ($this->requestSafety->isSafeMethod()) {
                $productIds = $this->resource->getConnection()->fetchCol(
                    '(' . implode(') UNION (', $this->linkedProductSelectBuilder->build($product->getId())) . ')'
                );

                $this->products[$product->getId()] = $this->collectionFactory->create()
                    ->addAttributeToSelect(['price', 'special_price', 'special_from_date', 'special_to_date'])
                    ->addIdFilter($productIds);
            } else {
                $this->products[$product->getId()] = $this->configurable->getUsedProducts($product);
            }
        }
        return $this->products[$product->getId()];
    }

Obviously I will create a module with a plugin o something like that, while magento apply the fix to the vendor

[cuiyang000]

@valenciaisaza wish I could find this issue earlier... After more than 7h digging, I came out with the same solution as you.

The issue for me is that even if all the sub-products' special price expired or haven't started yet, the main product still shown as having special price, and if you choose the option in the product detail page, the special price would change to regular one. So put it simple, the special from&to dates were not taken into account at all when displaying main product.

[olysenko]

Hi, thank you for your report. We already have internal issue MAGETWO-52577

[mauromm]

In Magento 2.1.3, the method getProducts() was moved to Magento\ConfigurableProduct\Pricing\Price\LowestPriceOptionsProvider

To patch it, you need to implement di.xml:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\ConfigurableProduct\Pricing\Price\LowestPriceOptionsProvider"
                type="YourVendor\YourModuleFixSpecialPrice\Pricing\Price\LowestPriceOptionsProvider" />
</config>

And replace:

  public function getProducts(ProductInterface $product)
   {
       $productIds = $this->resource->getConnection()->fetchCol(
           '(' . implode(') UNION (', $this->linkedProductSelectBuilder->build($product->getId())) . ')'
       );

       $lowestPriceChildProducts = $this->collectionFactory->create()
           ->addAttributeToSelect(['price', 'special_price','special_from_date', 'special_to_date'])
           ->addIdFilter($productIds)
           ->getItems();
       return $lowestPriceChildProducts;
   }