Magento – text swatch now showing out of stock Magento 2

I had the same issue and applied the 2nd fix given here: https://stackoverflow.com/questions/27270918/magento-1-9-1-not-sorting-configurable-product-attributes-dropdown-by-position:

[...] copy app/code/core/Mage/Catalog/Model/Resource/Product/Type/Configurable/Attribute/Collection.php to local folder app/code/local/Mage/Catalog/Model/Resource/Product/Type/Configurable/Attribute/Collection.php and apply this patch:

Index: app/code/local/Mage/Catalog/Model/Resource/Product/Type/Configurable/Attribute/Collection.php
===================================================================
--- app/code/local/Mage/Catalog/Model/Resource/Product/Type/Configurable/Attribute/Collection.php
+++ app/code/local/Mage/Catalog/Model/Resource/Product/Type/Configurable/Attribute/Collection.php
@@ -301,7 +301,28 @@
                     }
                 }
             }

+            /**
+             * Mage 1.9+ fix for configurable attribute options not sorting to position
+             * @author Harshit <support@cubixws.co.uk>
+             */
+            $sortOrder = 1;
+            foreach ($this->_items as $item) {
+                $productAttribute = $item->getProductAttribute();
+                if (!($productAttribute instanceof Mage_Eav_Model_Entity_Attribute_Abstract)) {
+                    continue;
+                }
+                $options = $productAttribute->getFrontend()->getSelectOptions();
+                foreach ($options as $option) {
+                    if (!$option['value']) continue;
+                    if (isset($values[$item->getId() . ':' . $option['value']])) {
+                        $values[$item->getId() . ':' . $option['value']]['order'] = $sortOrder++;
+                    }
+                }
+            }
+            usort($values, function($a, $b) {
+                return $a['order'] - $b['order'];
+            });
+            
             foreach ($values as $data) {
                 $this->getItemById($data['product_super_attribute_id'])->addPrice($data);
             }

If you are hesitant of copying across a core file to local folder then I can create a quick module, <rewrite> this Collection.php file and just override the _loadPrices() function and introduce this fix.

You just have to copy the core file to app/code/core/Mage/Catalog/Model/Resource/Product/Type/Configurable/Attribute/Collection.php and add the given code - it was line 304 for me.

It worked fine for my size attribute swatches.

You can write an observer for the event catalog_controller_product_init.
Add this to the config.xml file in one of your modules inside the <frontend> tag.

<events>
    <catalog_controller_product_init>
        <observers>
            <[namespace]_[module]>
                <class>[module]/observer</class>
                <method>showStock</method>
            </[namespace]_[module]>
        </observers>
    </catalog_controller_product_init>
</events>

then create the file [Namespace]/[Module]/Model/Observer.php

<?php 
class [Namespace]_[Module]_Model_Observer
{
    public function showStock(Varien_Event_Observer $observer)
    {
        /** @var Mage_Catalog_Model_Product $product */
        $product = $observer->getEvent()->getProduct();
        if ($product->getTypeId() == Mage_Catalog_Model_Product_Type::TYPE_CONFIGURABLE) {
            Mage::helper('catalog/product')->setSkipSaleableCheck(true);
        }
        return $this;
    }
}

The downside of this is that the configurable product will appear as in stock in the product even if all the simple products are out of stock.