{"id":1534,"date":"2018-03-13T17:35:18","date_gmt":"2018-03-13T16:35:18","guid":{"rendered":"https:\/\/wam.global\/wam-room\/extension-attributes-codehacks-i4\/"},"modified":"2026-02-10T16:05:09","modified_gmt":"2026-02-10T15:05:09","slug":"extension-attributes-codehacks-i4","status":"publish","type":"post","link":"https:\/\/wam.global\/es\/wam-room\/extension-attributes-codehacks-i4\/","title":{"rendered":"Exprimiendo los extension attributes en Magento 2 #Codehacks"},"content":{"rendered":"

En este post explicar\u00e9 como hacer un uso correcto de los extension attributes. Lo primero de todo es saber para qu\u00e9 sirve esta nueva funcionalidad de Magento 2.
Los extension attributes son usados para a\u00f1adir nuevos atributos a modelos sin tener que modificar ni la clase ni la interfaz de ellos. Esto es aplicable tanto a modelos propios de Magento como de m\u00f3dulos de terceros. El \u00fanico requisito es que la interfaz del modelo que vayamos a extender herede de  Magento Framework Api ExtensibleDataInterface<\/strong> y su clase de Magento Framework Model AbstractExtensibleModel<\/strong>.<\/p>\n

Para explicar esta nueva funcionalidad, vamos a basarnos en una entidad propia, la cual explicamos en el post Creaci\u00f3n de una nueva entidad en Magento 2.<\/a><\/p>\n

Cabe destacar que todo el m\u00f3dulo sigue las recomendaciones est\u00e1ndar de PHP<\/a>.<\/p>\n

Creaci\u00f3n de modelos, recursos y repositorios<\/h2>\n

Para el uso de los extension attributes tenemos 2 opciones, guardar estos nuevos atributos en la misma tabla de la base de datos o en otra distinta. El ejemplo que vamos a explicar es a\u00f1adiendo la nueva informaci\u00f3n en una tabla.<\/p>\n

Para ello, crearemos exactamente una nueva entidad con los mismos pasos que en el post Creaci\u00f3n de una nueva entidad en Magento 2.<\/a>. En nuesto caso, en el InstallSchema.php<\/strong> crearemos un campo que almacenar\u00e1 el id del modelo principal el cual ser\u00e1 una clave for\u00e1nea del campo del modelo principal.<\/p>\n

app \/ code \/ Interactiv4 \/ CustomPost \/ Setup \/ InstallSchema.php<\/strong>
<\/code><\/p>\n

<?php\n\/**\n * @author Interactiv4 Team\n * @copyright Copyright \u00a9 Interactiv4 (https:\/\/www.interactiv4.com)\n *\/\n\nnamespace Interactiv4CustomPostSetup;\n\nuse Interactiv4CustomPostApiDataPostInterface;\nuse Interactiv4PostApiDataEntityInterface;\nuse MagentoFrameworkDBAdapterAdapterInterface;\nuse MagentoFrameworkDBDdlTable;\nuse MagentoFrameworkSetupInstallSchemaInterface;\nuse MagentoFrameworkSetupModuleContextInterface;\nuse MagentoFrameworkSetupSchemaSetupInterface;\nuse Zend_Db_Exception;\n\n\/**\n * Class InstallSchema\n *\/\nclass InstallSchema implements InstallSchemaInterface\n{\n    \/**\n     * {@inheritdoc}\n     *\/\n    public function install(SchemaSetupInterface $setup, ModuleContextInterface $context)\n    {\n        $installer = $setup;\n\n        $installer->startSetup();\n\n        \/\/Custom post\n        $installer->getConnection()->dropTable($installer->getTable(PostInterface::SCHEMA_TABLE));\n        $this->installTableCustomPost($installer);\n\n        $installer->endSetup();\n    }\n\n\n    \/**\n     * Create table relations between custom entity and custom post\n     *\n     * @param SchemaSetupInterface $installer\n     * @throws Zend_Db_Exception\n     *\/\n    private function installTableCustomPost(SchemaSetupInterface $installer)\n    {\n        $table = $installer->getConnection()->newTable(\n            $installer->getTable(PostInterface::SCHEMA_TABLE)\n        )->addColumn(\n            PostInterface::FIELD_ID,\n            Table::TYPE_INTEGER,\n            null,\n            ['identity' => true, 'unsigned' => true, 'nullable' => false, 'primary' => true],\n            'Custom post Id'\n        )->addColumn(\n            PostInterface::FIELD_POST_ID,\n            Table::TYPE_INTEGER,\n            null,\n            ['unsigned' => true, 'nullable' => false],\n            'Post Id'\n        )->addColumn(\n            PostInterface::FIELD_SHORT_DESCRIPTION,\n            Table::TYPE_TEXT,\n            null,\n            ['nullable' => false, 'default' => ''],\n            'Short description'\n        )->addIndex(\n            $installer->getIdxName(\n                $installer->getTable(PostInterface::SCHEMA_TABLE),\n                [PostInterface::FIELD_POST_ID],\n                AdapterInterface::INDEX_TYPE_UNIQUE\n            ),\n            [PostInterface::FIELD_POST_ID],\n            ['type' => AdapterInterface::INDEX_TYPE_UNIQUE]\n        )->addForeignKey(\n            $installer->getFkName(\n                PostInterface::SCHEMA_TABLE,\n                PostInterface::FIELD_POST_ID,\n                EntityInterface::TABLE,\n                EntityInterface::ID\n            ),\n            PostInterface::FIELD_POST_ID,\n            $installer->getTable(EntityInterface::TABLE),\n            EntityInterface::ID,\n            Table::ACTION_CASCADE\n        )->setComment(\n            'Custom Post'\n        );\n\n        $installer->getConnection()->createTable($table);\n    }\n}<\/pre>\n
Creaci\u00f3n de extension attributes<\/h2>\n
Para a\u00f1adir los extension attributes a un modelo ya creado, debemos primero crear un archivo extension_attributes.xml<\/strong>, en el cual especificaremos la interfaz del modelo principal y los campos que vamos a a\u00f1adir.<\/p>\n
app \/ code \/ Interactiv4 \/ CustomPost \/ etc \/ extension_attributes.xml<\/strong><\/p>\n
<?xml version=\"1.0\"?>\n<!--\n~ @author Interactiv4 Team\n~ @copyright  Copyright \u00a9 Interactiv4 (https:\/\/www.interactiv4.com)\n-->\n\n<config xmlns_xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xsi_noNamespaceSchemaLocation=\"urn:magento:framework:Api\/etc\/extension_attributes.xsd\">\n   <extension_attributes for=\"Interactiv4PostApiDataEntityInterface\">\n       <attribute code=\"short_description\" type=\"string\">\n           <resources>\n               <resource ref=\"Interactiv4_Post::entity\"\/>\n           <\/resources>\n           <join reference_table=\"interactiv4_custompost_post\" reference_field=\"post_id\" join_on_field=\"entity_id\">\n               <field>short_description<\/field>\n           <\/join>\n       <\/attribute>\n   <\/extension_attributes>\n<\/config><\/code><\/pre>\n
En el ejemplo de arriba podemos ver, como le indicamos la interfaz del modelo principal, el nombre del nuevo atributo y su tipolog\u00eda (int, string, un objeto, array\u2026).<\/p>\n
El par\u00e1metro resources<\/strong>, es opcional y restringe el acceso al usuario con un permiso espec\u00edfico.<\/p>\n
Cabe destacar la especificaci\u00f3n del join<\/strong>, el cual es opcional. En este punto, especificamos nuestra nueva tabla y los campos que est\u00e1n referenciados entre s\u00ed entre el modelo principal y el nuestro. Esto s\u00f3lo funcionar\u00e1 si en el m\u00e9todo getList<\/strong> del repositorio principal est\u00e1 incluido el joinProcessor<\/strong> de los extension attributes (Magento  Framework  Api  ExtensionAttribute  JoinProcessorInterface)<\/strong>.<\/p>\n
app \/ code \/ Interactiv4 \/ Post \/ Model \/ EntityRepository.php<\/strong><\/p>\n
<?php\n\/**\n* @author Interactiv4 Team\n* @copyright Copyright (c) 2017 Interactiv4 (https:\/\/www.interactiv4.com)\n* @package Interactiv4_Post\n*\/\n\nnamespace Interactiv4PostModel;\n\n...\nuse MagentoFrameworkApiExtensionAttributeJoinProcessorInterface;\n\nclass EntityRepository implements EntityRepositoryInterface\n{\n\n...\n\n   \/**\n    * EntityRepository constructor.\n    *\n    * @param EntityFactory $entityFactory\n    * @param CollectionFactory $entityCollectionFactory\n    * @param EntitySearchResultsInterfaceFactory $entitySearchResultsInterfaceFactory\n    * @param CollectionProcessorInterface $collectionProcessor\n    * @param JoinProcessorInterface $extensionAttributesJoinProcessor\n    *\/\n   public function __construct(\n       EntityFactory $entityFactory,\n       CollectionFactory $entityCollectionFactory,\n       EntitySearchResultsInterfaceFactory $entitySearchResultsInterfaceFactory,\n       CollectionProcessorInterface $collectionProcessor,\n       JoinProcessorInterface $extensionAttributesJoinProcessor\n   ) {\n       $this->entityFactory = $entityFactory;\n       $this->entityCollectionFactory = $entityCollectionFactory;\n       $this->entitySearchResultsInterfaceFactory = $entitySearchResultsInterfaceFactory;\n       $this->collectionProcessor = $collectionProcessor;\n       $this->extensionAttributesJoinProcessor = $extensionAttributesJoinProcessor;\n   }\n\n   ...\n\n   \/**\n    * @inheritdoc\n    *\/\n   public function getList(SearchCriteriaInterface $searchCriteria)\n   {\n       \/** @var Collection $collection *\/\n       $collection = $this->entityCollectionFactory->create();\n\n       $this->extensionAttributesJoinProcessor->process($collection, EntityInterface::class);\n       $this->collectionProcessor->process($searchCriteria, $collection);\n\n       \/** @var EntitySearchResultsInterface $searchResults *\/\n       $searchResults = $this->entitySearchResultsInterfaceFactory->create();\n       $searchResults->setSearchCriteria($searchCriteria);\n       $searchResults->setItems($collection->getItems());\n       $searchResults->setTotalCount($collection->getSize());\n\n       return $searchResults;\n   }\n}<\/pre>\n
Gracias a este joinProcessor<\/strong> podemos definir en nuestro PostRepository.php<\/strong> una funci\u00f3n getListPostByShortDescription()<\/strong> la cual obtiene un listado de todas las entidades del modelo principal filtrando por el valor de un extension attributes.<\/p>\n
app \/ code \/ Interactiv4 \/ CustomPost \/ Model \/ PostRepository.php<\/strong><\/p>\n
<?php\n\/**\n * @author Interactiv4 Team\n * @copyright Copyright \u00a9 Interactiv4 (https:\/\/www.interactiv4.com)\n *\/\n\nnamespace Interactiv4CustomPostModel;\n\nuse Exception;\nuse Interactiv4CustomPostApiDataPostInterface;\nuse Interactiv4CustomPostApiDataPostSearchResultsInterface;\nuse Interactiv4CustomPostApiDataPostSearchResultsInterfaceFactory;\nuse Interactiv4CustomPostApiPostRepositoryInterface;\nuse Interactiv4CustomPostModelPostFactory;\nuse Interactiv4CustomPostModelResourceModelPost as ResourceCustomPost;\nuse Interactiv4CustomPostModelResourceModelPostCollection;\nuse Interactiv4CustomPostModelResourceModelPostCollectionFactory;\nuse Interactiv4PostApiDataEntityInterface;\nuse Interactiv4PostApiEntityRepositoryInterface;\nuse MagentoFrameworkApiExtensionAttributeJoinProcessorInterface;\nuse MagentoFrameworkApiFilterBuilder;\nuse MagentoFrameworkApiSearchSearchCriteria;\nuse MagentoFrameworkApiSearchSearchCriteriaBuilder;\nuse MagentoFrameworkApiSearchCriteriaCollectionProcessorInterface;\nuse MagentoFrameworkApiSearchCriteriaInterface;\nuse MagentoFrameworkApiSortOrder;\nuse MagentoFrameworkExceptionCouldNotSaveException;\nuse MagentoFrameworkExceptionNoSuchEntityException;\nuse MagentoFrameworkExceptionStateException;\nuse MagentoFrameworkExceptionValidatorException;\n\n\/**\n * Class PostRepository\n * @SuppressWarnings(PHPMD.CouplingBetweenObjects)\n *\/\nclass PostRepository implements PostRepositoryInterface\n{\n    \/**\n     * @var ResourceCustomPost\n     *\/\n    private $resourceCustomPost;\n\n    \/**\n     * @var PostFactory\n     *\/\n    private $customPostFactory;\n\n    \/**\n     * @var CollectionFactory\n     *\/\n    private $customPostCollectionFactory;\n\n    \/**\n     * @var PostSearchResultsInterfaceFactory\n     *\/\n    private $customPostSearchResultInterfaceFactory;\n\n    \/**\n     * @var CollectionProcessorInterface\n     *\/\n    private $collectionProcessor;\n\n    \/**\n     * @var JoinProcessorInterface\n     *\/\n    private $extensionAttributesJoinProcessor;\n\n    \/**\n     * @var EntityRepositoryInterface\n     *\/\n    private $entityRepository;\n\n    \/**\n     * @var FilterBuilder\n     *\/\n    private $filterBuilder;\n\n    \/**\n     * @var SearchCriteriaBuilder\n     *\/\n    private $searchCriteriaBuilder;\n\n    \/**\n     * @var SortOrder\n     *\/\n    private $sortOrder;\n\n    \/**\n     * PostRepository constructor.\n     *\n     * @param ResourceCustomPost $resourceCustomPost\n     * @param PostFactory $customPostFactory\n     * @param CollectionFactory $customPostCollectionFactory\n     * @param PostSearchResultsInterfaceFactory $customPostSearchResultInterfaceFactory\n     * @param CollectionProcessorInterface $collectionProcessor\n     * @param JoinProcessorInterface $extensionAttributesJoinProcessor\n     * @param EntityRepositoryInterface $entityRepository\n     * @param FilterBuilder $filterBuilder\n     * @param SearchCriteriaBuilder $searchCriteriaBuilder\n     * @param SortOrder $sortOrder\n     * @SuppressWarnings(PHPMD.ExcessiveParameterList)\n     *\/\n    public function __construct(\n        ResourceCustomPost $resourceCustomPost,\n        PostFactory $customPostFactory,\n        CollectionFactory $customPostCollectionFactory,\n        PostSearchResultsInterfaceFactory $customPostSearchResultInterfaceFactory,\n        CollectionProcessorInterface $collectionProcessor,\n        JoinProcessorInterface $extensionAttributesJoinProcessor,\n        EntityRepositoryInterface $entityRepository,\n        FilterBuilder $filterBuilder,\n        SearchCriteriaBuilder $searchCriteriaBuilder,\n        SortOrder $sortOrder\n    ) {\n        $this->resourceCustomPost                     = $resourceCustomPost;\n        $this->customPostFactory                      = $customPostFactory;\n        $this->customPostCollectionFactory            = $customPostCollectionFactory;\n        $this->customPostSearchResultInterfaceFactory = $customPostSearchResultInterfaceFactory;\n        $this->collectionProcessor                    = $collectionProcessor;\n        $this->extensionAttributesJoinProcessor       = $extensionAttributesJoinProcessor;\n        $this->entityRepository                       = $entityRepository;\n        $this->filterBuilder                          = $filterBuilder;\n        $this->searchCriteriaBuilder                  = $searchCriteriaBuilder;\n        $this->sortOrder                              = $sortOrder;\n    }\n\n    \/**\n     * @inheritdoc\n     *\/\n    public function save(PostInterface $customPost)\n    {\n        $this->resourceCustomPost->save($customPost);\n\n        return $customPost;\n    }\n\n    \/**\n     * @inheritdoc\n     *\/\n    public function getById($customPostId)\n    {\n        return $this->get($customPostId);\n    }\n\n    \/**\n     * @inheritdoc\n     *\/\n    public function get($value, $attributeCode = null)\n    {\n        \/** @var Post $customPost *\/\n        $customPost = $this->customPostFactory->create()->load($value, $attributeCode);\n\n        if (!$customPost->getId()) {\n            throw new NoSuchEntityException(__('Unable to find custom post'));\n        }\n\n        return $customPost;\n    }\n\n    \/**\n     * @inheritdoc\n     *\/\n    public function delete(PostInterface $customPost)\n    {\n        $customPostId = $customPost->getId();\n        try {\n            $this->resourceCustomPost->delete($customPost);\n        } catch (Exception $e) {\n            throw new StateException(\n                __('Unable to remove custom post %1', $customPostId)\n            );\n        }\n\n        return true;\n    }\n\n    \/**\n     * @inheritdoc\n     *\/\n    public function deleteById($customPostId)\n    {\n        $customPost = $this->getById($customPostId);\n\n        return $this->delete($customPost);\n    }\n\n    \/**\n     * @inheritdoc\n     *\/\n    public function getList(SearchCriteriaInterface $searchCriteria)\n    {\n        \/** @var Collection $collection *\/\n        $collection = $this->customPostCollectionFactory->create();\n\n        $this->extensionAttributesJoinProcessor->process($collection, PostInterface::class);\n        $this->collectionProcessor->process($searchCriteria, $collection);\n\n        \/** @var PostSearchResultsInterface $searchResults *\/\n        $searchResults = $this->customPostSearchResultInterfaceFactory->create();\n        $searchResults->setSearchCriteria($searchCriteria);\n        $searchResults->setItems($collection->getItems());\n        $searchResults->setTotalCount($collection->getSize());\n\n        return $searchResults;\n    }\n\n    \/**\n     * @inheritdoc\n     *\/\n    public function getListPostByShortDescription($shortDescription)\n    {\n\n        $filter = $this->filterBuilder\n            ->setField(PostInterface::FIELD_SHORT_DESCRIPTION)\n            ->setValue($shortDescription)\n            ->setConditionType('LIKE')\n            ->create();\n\n        \/** @var SearchCriteria $searchCriteria *\/\n        $searchCriteria = $this->searchCriteriaBuilder->addFilter($filter);\n\n        $sortOrder = $this->sortOrder->setField(EntityInterface::NAME)->setDirection('asc');\n        $searchCriteria->setSortOrders([$sortOrder]);\n        $entitySearchResults = $this->entityRepository->getList($searchCriteria);\n\n        return $entitySearchResults;\n    }\n}<\/pre>\n
Gracias a la definici\u00f3n del archivo extension_attributes.xml<\/strong>, Magento generar\u00e1 en la carpeta var \/ generation<\/strong> (< Magento 2.2) o generated (> Magento 2.2) una clase EntityExtensionInterface.php<\/strong> con los getters y setters de los atributos que hayamos definido en dicho archivo xml.<\/p>\n
var \/ generation \/ Interactiv4 \/ Post \/ Api \/ Data \/ EntityExtensionInterface.php<\/strong> \u00f3
generated \/ code \/ Interactiv4 \/ Post \/ Api \/ Data \/ EntityExtensionInterface.php<\/strong><\/p>\n<\/p>\n
<?php\n\/**\n* @author Interactiv4 Team\n* @copyright  Copyright \u00a9 Interactiv4 (https:\/\/www.interactiv4.com)\n*\/\n\nnamespace Interactiv4PostApiData;\n\n\/**\n* ExtensionInterface class for @see Interactiv4PostApiDataEntityInterface\n*\/\ninterface EntityExtensionInterface extends MagentoFrameworkApiExtensionAttributesInterface\n{\n   \/**\n    * @return string|null\n    *\/\n   public function getShortDescription();\n\n   \/**\n    * @param string $shortDescription\n    * @return $this\n    *\/\n   public function setShortDescription($shortDescription);\n}<\/pre>\n
Obtener y almacenar informaci\u00f3n de extension attributes<\/h2>\n
Plugins<\/h3>\n
Magento no almacena ni obtiene la informaci\u00f3n de los extension attributes de manera autom\u00e1tica. Tenemos que obtenerla y guardarla de manera manual haciendo uso de los plugins en las funciones get()<\/strong>, getList()<\/strong> y save()<\/strong> del repositorio principal.<\/p>\n
app \/ etc \/ di.xml<\/strong><\/p>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!--\n~ @author Interactiv4 Team\n~ @copyright  Copyright \u00a9 Interactiv4 (https:\/\/www.interactiv4.com)\n-->\n\n<config xmlns_xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xsi_noNamespaceSchemaLocation=\"urn:magento:framework:ObjectManager\/etc\/config.xsd\">\n   <preference for=\"Interactiv4CustomPostApiDataPostInterface\" type=\"Interactiv4CustomPostModelPost\" \/>\n   <preference for=\"Interactiv4CustomPostApiDataPostSearchResultsInterface\" type=\"Interactiv4CustomPostModelPostSearchResults\" \/>\n   <preference for=\"Interactiv4CustomPostApiPostRepositoryInterface\" type=\"Interactiv4CustomPostModelPostRepository\" \/>\n   <type name=\"Interactiv4PostApiEntityRepositoryInterface\">\n       <plugin name=\"interactiv4_custompost_plugin_entity_repository\" type=\"Interactiv4CustomPostPluginEntityRepositoryPlugin\"\/>\n   <\/type>\n<\/config><\/pre>\n
app \/ code \/ Plugin \/ EntityRepositoryPlugin.php<\/strong><\/p>\n
<?php\n\/**\n * @author Interactiv4 Team\n * @copyright Copyright \u00a9 Interactiv4 (https:\/\/www.interactiv4.com)\n *\/\n\nnamespace Interactiv4CustomPostPlugin;\n\nuse Interactiv4CustomPostApiDataPostInterface;\nuse Interactiv4CustomPostApiDataPostInterfaceFactory;\nuse Interactiv4CustomPostApiPostRepositoryInterface;\nuse Interactiv4PostApiDataEntityExtensionFactory;\nuse Interactiv4PostApiDataEntityExtensionInterface;\nuse Interactiv4PostApiDataEntityInterface;\nuse Interactiv4PostApiDataEntitySearchResultsInterface;\nuse Interactiv4PostApiEntityRepositoryInterface;\nuse MagentoFrameworkExceptionCouldNotSaveException;\nuse MagentoFrameworkExceptionNoSuchEntityException;\n\n\/**\n * Class EntityRepositoryPlugin\n *\/\nclass EntityRepositoryPlugin\n{\n    \/**\n     * @var EntityExtensionFactory\n     *\/\n    private $entityExtensionFactory;\n\n    \/**\n     * @var PostInterfaceFactory\n     *\/\n    private $customPostFactory;\n\n    \/**\n     * @var PostRepositoryInterface\n     *\/\n    private $customPostRepository;\n\n    \/**\n     * PostGet constructor.\n     *\n     * @param EntityExtensionFactory $entityExtensionFactory\n     * @param PostInterfaceFactory $customPostFactory\n     * @param PostRepositoryInterface $customPostRepository\n     *\/\n    public function __construct(\n        EntityExtensionFactory $entityExtensionFactory,\n        PostInterfaceFactory $customPostFactory,\n        PostRepositoryInterface $customPostRepository\n    ) {\n        $this->entityExtensionFactory = $entityExtensionFactory;\n        $this->customPostFactory      = $customPostFactory;\n        $this->customPostRepository   = $customPostRepository;\n    }\n\n    \/**\n     * @param EntityRepositoryInterface $subject\n     * @param EntityInterface $result\n     * @return EntityInterface\n     * @SuppressWarnings(PHPMD.UnusedFormalParameter)\n     *\/\n    public function afterGet(EntityRepositoryInterface $subject, EntityInterface $result)\n    {\n        \/** @var EntityExtensionInterface $extensionAttributes *\/\n        $extensionAttributes = $result->getExtensionAttributes() ?: $this->entityExtensionFactory->create();\n\n        try {\n            \/** @var PostInterface $customPost *\/\n            $customPost = $this->customPostRepository->get($result->getId(), PostInterface::FIELD_POST_ID);\n        } catch (NoSuchEntityException $e) {\n            $result->setExtensionAttributes($extensionAttributes);\n\n            return $result;\n        }\n        $extensionAttributes->setShortDescription($customPost->getShortDescription());\n\n        $result->setExtensionAttributes($extensionAttributes);\n\n        return $result;\n    }\n\n    \/**\n     * @param EntityRepositoryInterface $subject\n     * @param EntitySearchResultsInterface $entities\n     * @return EntitySearchResultsInterface\n     *\/\n    public function afterGetList(EntityRepositoryInterface $subject, EntitySearchResultsInterface $entities)\n    {\n        foreach ($entities->getItems() as $entity) {\n            $this->afterGet($subject, $entity);\n        }\n\n        return $entities;\n    }\n\n    \/**\n     * @param EntityRepositoryInterface $subject\n     * @param EntityInterface $result\n     * @return EntityInterface\n     * @throws CouldNotSaveException\n     * @SuppressWarnings(PHPMD.UnusedFormalParameter)\n     *\/\n    public function afterSave(EntityRepositoryInterface $subject, EntityInterface $result)\n    {\n        $extensionAttributes = $result->getExtensionAttributes() ?: $this->entityExtensionFactory->create();\n        if ($extensionAttributes !== null &&\n            $extensionAttributes->getShortDescription() !== null\n        ) {\n            \/** @var PostInterface $customPost *\/\n            try {\n                $customPost = $this->customPostRepository->get($result->getId(), PostInterface::FIELD_POST_ID);\n            } catch (NoSuchEntityException $e) {\n                $customPost = $this->customPostFactory->create();\n            }\n            $customPost->setPostId($result->getId());\n            $customPost->setShortDescription($extensionAttributes->getShortDescription());\n            $this->customPostRepository->save($customPost);\n        }\n\n        return $result;\n    }\n}<\/pre>\n
De esta manera conseguimos que cada vez que se cargue un modelo o un listado, contenga la informaci\u00f3n adicional de los extension attributes. A su vez, cada vez que guardemos la informaci\u00f3n de un producto, tambi\u00e9n guardaremos la informaci\u00f3n adicional.<\/p>\n
Espero que os haya sido de ayuda y cualquier duda pod\u00e9is dejar un comentario.<\/p>\n
En este link<\/a> pod\u00e9is descargar el c\u00f3digo de esta explicaci\u00f3n y en este otrolink<\/a> la entidad principal de la que vamos a extender.<\/p>","protected":false},"excerpt":{"rendered":"
En este post explicar\u00e9 como hacer un uso correcto de los extension attributes. Lo primero de todo es saber para qu\u00e9 sirve esta nueva funcionalidad de Magento 2.Los extension attributes son usados para a\u00f1adir nuevos atributos a modelos sin tener que modificar ni la clase ni la interfaz de ellos. Esto es aplicable tanto a […]<\/p>\n","protected":false},"author":4,"featured_media":5754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[50],"tags":[207,191],"solutions":[],"formats":[40],"class_list":["post-1534","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia","tag-code-hacks","tag-magento","formats-articulo"],"acf":[],"yoast_head":"\nExtension Attributes en Magento 2 | Interactiv4<\/title>\n<meta name=\"description\" content=\"Exprimiendo Los Extension Attributes en Magento 2 #Codehacks. Ra\u00fal Mateos nos explica como hacer un uso correcto de los extension attributes y para qu\u00e9 sirve esta nueva funcionalidad de Magento 2. 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