Return the associated sku of a configurable product

README.md

@@ -5,14 +5,16 @@ This extension improves default features of Magento API.
 It allows you to:
 
 * Associate simple products to configurable or grouped product;
+* Retrieve simple products from configurable products;
+* Retrieve configurable attributes used in configurable products;
 * Specify category names rather than the ids;
 * Specify the name of the attribute set rather than the id;
 * Specify options labels rather than the ids;
 * Specify the website code rather than the id.
 
 ## Installation
 
-### Magento CE 1.6.x, 1.7.x
+### Magento CE 1.6.x, 1.7.x (retrieval of simple products and configurable attributes worked on 1.5.x)
 
 Install with [modgit](https://github.com/jreinke/modgit):
 
@@ -28,4 +30,10 @@ or download package manually:
 
 ## How to associate simple products to configurable/grouped product
 
-Please refer to [this article](http://www.bubblecode.net/en/2012/04/20/magento-api-associate-simple-products-to-configurable-or-grouped-product/).
+Please refer to [this article](http://www.bubblecode.net/en/2012/04/20/magento-api-associate-simple-products-to-configurable-or-grouped-product/).
+
+## How to retrieve simple products and used configurable attributes from configurable products
+
+Consume the "catalogProductInfo" method from the SOAP API on neither  V1 and V2 versions.
+
+The simple products list will be on the "associated_skus" attribute and the configurable attributes list will be on the "configurable_attributes" attribute.

app/code/community/Bubble/Api/Model/Catalog/Product/Api.php

@@ -52,4 +52,26 @@ protected function _prepareDataForSave($product, $productData)
             Mage::helper('bubble_api/catalog_product')->associateProducts($product, $simpleSkus, $priceChanges, $configurableAttributes);
         }
     }
+
+    // Not tested
+    public function info($productId, $store = null, $attributes = null, $identifierType = null)
+    {
+        $result = parent::info($productId, $store, $attributes, $identifierType);
+        if ($result['type'] == 'configurable') {
+            $associated_skus = array();
+            $product = Mage::getModel('catalog/product')->load($productId);
+            $used_products = Mage::getModel('catalog/product_type_configurable')->getUsedProducts(null,$product);
+            foreach ($used_products as $used_product) {
+                $associated_skus[] = $used_product->getSku();
+            }
+            $result += ['associated_skus' => $associated_skus];
+            $configurable_attributes = array();
+            $_configurable_attributes = Mage::getModel('catalog/product_type_configurable')->getUsedProductAttributeIds($product);
+            foreach ($_configurable_attributes as $configurable_attribute) {
+                $configurable_attributes[] = Mage::getModel('eav/entity_attribute')->load($configurable_attribute)->getAttributeCode();
+            }
+            $result += ['configurable_attributes' => $configurable_attributes];
+        }
+        return $result;
+    }
 }

app/code/community/Bubble/Api/Model/Catalog/Product/Api/V2.php

@@ -84,4 +84,25 @@ protected function _prepareDataForSave($product, $productData)
             Mage::helper('bubble_api/catalog_product')->associateProducts($product, $simpleSkus, $priceChanges, $configurableAttributes);
         }
     }
+
+    public function info($productId, $store = null, $attributes = null, $identifierType = null)
+    {
+        $result = parent::info($productId, $store, $attributes, $identifierType);
+        if ($result['type'] == 'configurable') {
+            $associated_skus = array();
+            $product = Mage::getModel('catalog/product')->load($productId);
+            $used_products = Mage::getModel('catalog/product_type_configurable')->getUsedProducts(null,$product);
+            foreach ($used_products as $used_product) {
+                $associated_skus[] = $used_product->getSku();
+            }
+            $result += ['associated_skus' => $associated_skus];
+            $configurable_attributes = array();
+            $_configurable_attributes = Mage::getModel('catalog/product_type_configurable')->getUsedProductAttributeIds($product);
+            foreach ($_configurable_attributes as $configurable_attribute) {
+                $configurable_attributes[] = Mage::getModel('eav/entity_attribute')->load($configurable_attribute)->getAttributeCode();
+            }
+            $result += ['configurable_attributes' => $configurable_attributes];
+        }
+        return $result;
+    }
 }

app/code/community/Bubble/Api/etc/wsdl.xml

@@ -12,6 +12,11 @@
                     <element name="configurable_attributes" type="typens:ArrayOfString" minOccurs="0"/>
                     <element name="price_changes" type="typens:associativeArray" minOccurs="0" />
                 </all>
+            </complexType>  
+            <complexType name="catalogProductReturnEntity">
+                <all>
+                    <element name="associated_skus" type="typens:ArrayOfString" minOccurs="0"/>
+                </all>
             </complexType>
         </schema>
     </types>

app/code/community/Bubble/Api/etc/wsi.xml

@@ -25,6 +25,11 @@
                     <xsd:element name="configurable_attributes" type="typens:ArrayOfString" minOccurs="0" />
                     <xsd:element name="price_changes" type="typens:complexMultiArray" minOccurs="0" />
                 </xsd:sequence>
+            </xsd:complexType>   
+            <xsd:complexType name="catalogProductReturnEntity">
+                <xsd:sequence>
+                    <xsd:element name="associated_skus" type="typens:ArrayOfString" minOccurs="0" />
+                </xsd:sequence>
             </xsd:complexType>
         </xsd:schema>
     </wsdl:types>