Fix magento#271.

Added _media_attribute_id validation during the first step of the import procoess

Author: barbazul

app/code/core/Mage/ImportExport/Model/Import/Entity/Product.php

@@ -94,6 +94,7 @@ class Mage_ImportExport_Model_Import_Entity_Product extends Mage_ImportExport_Mo
     const ERROR_GROUP_PRICE_DATA_INCOMPLETE  = 'groupPriceDataIsIncomplete';
     const ERROR_SKU_NOT_FOUND_FOR_DELETE     = 'skuNotFoundToDelete';
     const ERROR_SUPER_PRODUCTS_SKU_NOT_FOUND = 'superProductsSkuNotFound';
+    const ERROR_MEDIA_DATA_INCOMPLETE        = 'mediaDataIsIncomplete';
 
     /**
      * Pairs of attribute set ID-to-name.
@@ -182,7 +183,8 @@ class Mage_ImportExport_Model_Import_Entity_Product extends Mage_ImportExport_Mo
         self::ERROR_INVALID_TIER_PRICE_GROUP     => 'Tier Price customer group ID is invalid',
         self::ERROR_TIER_DATA_INCOMPLETE         => 'Tier Price data is incomplete',
         self::ERROR_SKU_NOT_FOUND_FOR_DELETE     => 'Product with specified SKU not found',
-        self::ERROR_SUPER_PRODUCTS_SKU_NOT_FOUND => 'Product with specified super products SKU not found'
+        self::ERROR_SUPER_PRODUCTS_SKU_NOT_FOUND => 'Product with specified super products SKU not found',
+        self::ERROR_MEDIA_DATA_INCOMPLETE        => 'Media data is incomplete'
     );
 
     /**
@@ -693,6 +695,23 @@ protected function _isSuperProductsSkuValid($rowData, $rowNum)
         return true;
     }
 
+    /**
+     * Check media information
+     *
+     * @param array $rowData
+     * @param int $rowNum
+     * @return bool
+     */
+    protected function _isMediaValid($rowData, $rowNum)
+    {
+        if (!empty($rowData['_media_image']) && empty($rowData['_media_attribute_id'])) {
+            $this->addRowError(self::ERROR_MEDIA_DATA_INCOMPLETE, $rowNum);
+            return false;
+        }
+
+        return true;
+    }
+
     /**
      * Gather and save information about product links.
      * Must be called after ALL products saving done.
@@ -1567,6 +1586,7 @@ public function validateRow(array $rowData, $rowNum)
         $this->_isTierPriceValid($rowData, $rowNum);
         $this->_isGroupPriceValid($rowData, $rowNum);
         $this->_isSuperProductsSkuValid($rowData, $rowNum);
+        $this->_isMediaValid($rowData, $rowNum);
 
         if (self::SCOPE_DEFAULT == $rowScope) { // SKU is specified, row is SCOPE_DEFAULT, new product block begins
             $this->_processedEntitiesCount ++;