Comment créer une entité EAV?

Comment créer une entité EAV?

C'est une question qui revient souvent sur le web. Il existe de bons articles de blog qui expliquent comment faire cela, mais aucun ne me satisfait.
J'ai donc décidé de poser moi-même une question et d'expliquer comment je le fais ... et cela semble fonctionner.

Il y a beaucoup de code ici. Pour lire correctement, triez les réponses par 'plus ancien'.

Partie 1

Pour les besoins de cette démonstration, je vais créer un module, nommons-le Easylife_Newscontenant une entité nommée Article.
Le module est livré avec le code CRUD complet pour le backend, y compris la section pour la gestion des attributs, et une simple liste de front-end et une page d'affichage pour chaque article. Il ajoute également un élément de menu dans le menu supérieur à la liste des articles.
Il contient également des réécritures d'URL, des flux RSS et des chemins de navigation pour l'interface. Cette entité aura 4 attributs: Title, Short Description, Description, Publish Dateen plus de ceux du système ( created_at, updated_at, status, in_rss, url_key).
Le module doit contenir les fichiers suivants.

app/etc/module/Easylife_News.xml - le module de déclaration:

<?xml version="1.0"?>
<config>
    <modules>
        <Easylife_News>
            <active>true</active>
            <codePool>local</codePool>
            <depends>
                <Mage_Catalog /><!-- some classes extend one class from the catalog module to avoid duplicating it -->
             </depends>
        </Easylife_News>
    </modules>
</config>

app/code/local/Easylife/News/etc/config.xml - le fichier de configuration

<?xml version="1.0"?>
<config>
    <modules>
        <Easylife_News>
            <version>1.0.0</version>
        </Easylife_News>
    </modules>
    <global>
        <resources>
            <easylife_news_setup>
                <setup>
                    <module>Easylife_News</module>
                    <class>Easylife_News_Model_Resource_Setup</class>
                </setup>
            </easylife_news_setup>
        </resources>
        <blocks>
            <easylife_news>
                <class>Easylife_News_Block</class>
            </easylife_news>
        </blocks>
        <helpers>
            <easylife_news>
                <class>Easylife_News_Helper</class>
            </easylife_news>
        </helpers>
        <models>
            <easylife_news>
                <class>Easylife_News_Model</class>
                <resourceModel>easylife_news_resource</resourceModel>
            </easylife_news>
            <easylife_news_resource>
                <class>Easylife_News_Model_Resource</class>
                <entities>
                    <article>
                        <table>easylife_news_article</table>
                    </article>
                    <eav_attribute>
                        <table>easylife_news_eav_attribute</table>
                    </eav_attribute>
                </entities>
            </easylife_news_resource>
        </models>
        <events>
            <controller_front_init_routers><!-- event for custom router - url rewrites -->
                <observers>
                    <easylife_news>
                        <class>Easylife_News_Controller_Router</class>
                        <method>initControllerRouters</method>
                    </easylife_news>
                </observers>
            </controller_front_init_routers>
        </events>
    </global>
    <adminhtml>
        <layout>
            <updates>
                <easylife_news>
                    <file>easylife_news.xml</file>
                </easylife_news>
            </updates>
        </layout>
        <translate>
            <modules>
                <Easylife_News>
                    <files>
                        <default>Easylife_News.csv</default>
                    </files>
                </Easylife_News>
            </modules>
        </translate>
        <global_search>
            <article>
                <class>easylife_news/adminhtml_search_article</class>
                <acl>easylife_news</acl>
            </article>
        </global_search>
    </adminhtml>
    <admin>
        <routers>
            <adminhtml>
                <args>
                    <modules>
                        <Easylife_News before="Mage_Adminhtml">Easylife_News_Adminhtml</Easylife_News>
                    </modules>
                </args>
            </adminhtml>
        </routers>
    </admin>
    <frontend>
        <events>
            <page_block_html_topmenu_gethtml_before><!-- add link to top menu -->
                <observers>
                    <easylife_news>
                        <class>easylife_news/observer</class>
                        <method>addItemsToTopmenuItems</method>
                    </easylife_news>
                </observers>
            </page_block_html_topmenu_gethtml_before>
        </events>

        <routers>
            <easylife_news>
                <use>standard</use>
                <args>
                    <module>Easylife_News</module>
                    <frontName>news</frontName>
                </args>
            </easylife_news>
        </routers>
        <layout>
            <updates>
                <easylife_news>
                    <file>easylife_news.xml</file>
                </easylife_news>
            </updates>
        </layout>
        <translate>
            <modules>
                <Easylife_News>
                    <files>
                        <default>Easylife_News.csv</default>
                    </files>
                </Easylife_News>
            </modules>
        </translate>
    </frontend>
    <default>
        <easylife_news>
            <article>
                <breadcrumbs>1</breadcrumbs>
                <url_prefix>article</url_prefix>
                <url_suffix>html</url_suffix>
                <rss>1</rss>
                <meta_title>Articles</meta_title>
            </article>
        </easylife_news>
    </default>
</config>

app/code/local/Easylife/News/etc/adminhtml.xml - le fichier admin acl et menu.

<?xml version="1.0"?>
<config>
    <acl>
        <resources>
            <admin>
                <children>
                    <system>
                        <children>
                            <config>
                                <children>
                                    <easylife_news translate="title" module="easylife_news">
                                        <title>News</title>
                                    </easylife_news>
                                </children>
                            </config>
                        </children>
                    </system>
                    <cms>
                        <children>
                            <easylife_news translate="title" module="easylife_news">
                                <title>News</title>
                                    <children>
                                        <article translate="title" module="easylife_news">
                                            <title>Article</title>
                                            <sort_order>0</sort_order>
                                        </article>
                                        <article_attributes translate="title" module="easylife_news">
                                            <title>Manage Article attributes</title>
                                            <sort_order>7</sort_order>
                                        </article_attributes>
                                    </children>
                                </easylife_news>
                            </children>
                        </cms>

                </children>
            </admin>
        </resources>
    </acl>
    <menu>
        <cms><!-- I added the admin menu under CMS. Feel free to move it. -->
            <children>
                <easylife_news translate="title" module="easylife_news">
                    <title>News</title>
                    <sort_order>17</sort_order>
                    <children>
                        <article translate="title" module="easylife_news">
                            <title>Article</title>
                            <action>adminhtml/news_article</action>
                            <sort_order>0</sort_order>
                        </article>
                        <article_attributes translate="title" module="easylife_news">
                            <title>Manage Article Attributes</title>
                            <action>adminhtml/news_article_attribute</action>
                            <sort_order>7</sort_order>
                        </article_attributes>
                    </children>
                </easylife_news>
            </children>
        </cms>

    </menu>
</config>

app/code/local/Easylife/News/etc/system.xml- le fichier de configuration du système. Il vous permet de gérer quelques paramètres tels que le référencement pour la liste d'articles, le fil d'Ariane, l'activation / désactivation de RSS, le préfixe d'URL et le suffixe.

<?xml version="1.0"?>
<config>
    <tabs>
        <easylife translate="label" module="easylife_news">
            <label>News</label>
            <sort_order>2000</sort_order>
        </easylife>
    </tabs>
    <sections>
        <easylife_news translate="label" module="easylife_news">
            <class>separator-top</class>
            <label>News</label>
            <tab>easylife</tab>
            <frontend_type>text</frontend_type>
            <sort_order>100</sort_order>
            <show_in_default>1</show_in_default>
            <show_in_website>1</show_in_website>
            <show_in_store>1</show_in_store>
            <groups>
                <article translate="label" module="easylife_news">
                    <label>Article</label>
                    <frontend_type>text</frontend_type>
                    <sort_order>0</sort_order>
                    <show_in_default>1</show_in_default>
                    <show_in_website>1</show_in_website>
                    <show_in_store>1</show_in_store>
                    <fields>
                        <breadcrumbs translate="label">
                            <label>Use Breadcrumbs</label>
                            <frontend_type>select</frontend_type>
                            <source_model>adminhtml/system_config_source_yesno</source_model>
                            <sort_order>10</sort_order>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                        </breadcrumbs>
                        <url_prefix translate="label comment">
                            <label>URL prefix</label>
                            <frontend_type>text</frontend_type>
                            <sort_order>20</sort_order>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                            <comment>Leave empty for no prefix</comment>
                        </url_prefix>
                        <url_suffix translate="label comment">
                            <label>Url suffix</label>
                            <frontend_type>text</frontend_type>
                            <sort_order>30</sort_order>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                            <comment>What goes after the dot. Leave empty for no suffix.</comment>
                        </url_suffix>
                        <rss translate="label">
                            <label>Enable rss</label>
                            <frontend_type>select</frontend_type>
                            <source_model>adminhtml/system_config_source_yesno</source_model>
                            <sort_order>40</sort_order>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                        </rss>
                        <meta_title translate="label">
                            <label>Meta title for articles list page</label>
                            <frontend_type>text</frontend_type>
                            <sort_order>50</sort_order>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                        </meta_title>
                        <meta_description translate="label">
                            <label>Meta description for articles list page</label>
                            <frontend_type>textarea</frontend_type>
                            <sort_order>60</sort_order>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                        </meta_description>
                        <meta_keywords translate="label">
                            <label>Meta keywords for articles list page</label>
                            <frontend_type>textarea</frontend_type>
                            <sort_order>70</sort_order>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                        </meta_keywords>
                    </fields>
                </article>
            </groups>
        </easylife_news>
    </sections>
</config>

app/code/local/Easylife/News/sql/easylife_news_setup/install-1.0.0.php - le script d'installation

<?php
$this->startSetup();
//create the entity table
$table = $this->getConnection()
    ->newTable($this->getTable('easylife_news/article'))
    ->addColumn('entity_id', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(
        'identity'  => true,
        'unsigned'  => true,
        'nullable'  => false,
        'primary'   => true,
        ), 'Entity ID')
    ->addColumn('entity_type_id', Varien_Db_Ddl_Table::TYPE_SMALLINT, null, array(
        'unsigned'  => true,
        'nullable'  => false,
        'default'   => '0',
        ), 'Entity Type ID')
    ->addColumn('attribute_set_id', Varien_Db_Ddl_Table::TYPE_SMALLINT, null, array(
        'unsigned'  => true,
        'nullable'  => false,
        'default'   => '0',
        ), 'Attribute Set ID')
    ->addColumn('created_at', Varien_Db_Ddl_Table::TYPE_TIMESTAMP, null, array(
        ), 'Creation Time')
    ->addColumn('updated_at', Varien_Db_Ddl_Table::TYPE_TIMESTAMP, null, array(
        ), 'Update Time')
    ->addIndex($this->getIdxName('easylife_news/article', array('entity_type_id')),
        array('entity_type_id'))
    ->addIndex($this->getIdxName('easylife_news/article', array('attribute_set_id')),
        array('attribute_set_id'))
    ->addForeignKey(
        $this->getFkName(
            'easylife_news/article',
            'attribute_set_id',
            'eav/attribute_set',
            'attribute_set_id'
        ),
        'attribute_set_id', $this->getTable('eav/attribute_set'), 'attribute_set_id',
        Varien_Db_Ddl_Table::ACTION_CASCADE, Varien_Db_Ddl_Table::ACTION_CASCADE)
    ->addForeignKey($this->getFkName('easylife_news/article', 'entity_type_id', 'eav/entity_type', 'entity_type_id'),
        'entity_type_id', $this->getTable('eav/entity_type'), 'entity_type_id',
        Varien_Db_Ddl_Table::ACTION_CASCADE, Varien_Db_Ddl_Table::ACTION_CASCADE)
    ->setComment('Article Table');
$this->getConnection()->createTable($table);

//create the attribute values tables (int, decimal, varchar, text, datetime)
$articleEav = array();
$articleEav['int'] = array(
    'type'      => Varien_Db_Ddl_Table::TYPE_INTEGER,
    'length'    => null,
    'comment'   => 'Article Datetime Attribute Backend Table'
);

$articleEav['varchar'] = array(
    'type'      => Varien_Db_Ddl_Table::TYPE_TEXT,
    'length'    => 255,
    'comment'   => 'Article Varchar Attribute Backend Table'
);

$articleEav['text'] = array(
    'type'      => Varien_Db_Ddl_Table::TYPE_TEXT,
    'length'    => '64k',
    'comment'   => 'Article Text Attribute Backend Table'
);

$articleEav['datetime'] = array(
    'type'      => Varien_Db_Ddl_Table::TYPE_DATETIME,
    'length'    => null,
    'comment'   => 'Article Datetime Attribute Backend Table'
);

$articleEav['decimal'] = array(
    'type'      => Varien_Db_Ddl_Table::TYPE_DECIMAL,
    'length'    => '12,4',
    'comment'   => 'Article Datetime Attribute Backend Table'
);

foreach ($articleEav as $type => $options) {
    $table = $this->getConnection()
        ->newTable($this->getTable(array('easylife_news/article', $type)))
        ->addColumn('value_id', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(
            'identity'  => true,
            'nullable'  => false,
            'primary'   => true,
            ), 'Value ID')
        ->addColumn('entity_type_id', Varien_Db_Ddl_Table::TYPE_SMALLINT, null, array(
            'unsigned'  => true,
            'nullable'  => false,
            'default'   => '0',
            ), 'Entity Type ID')
        ->addColumn('attribute_id', Varien_Db_Ddl_Table::TYPE_SMALLINT, null, array(
            'unsigned'  => true,
            'nullable'  => false,
            'default'   => '0',
            ), 'Attribute ID')
        ->addColumn('store_id', Varien_Db_Ddl_Table::TYPE_SMALLINT, null, array(
            'unsigned'  => true,
            'nullable'  => false,
            'default'   => '0',
            ), 'Store ID')
        ->addColumn('entity_id', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(
            'unsigned'  => true,
            'nullable'  => false,
            'default'   => '0',
            ), 'Entity ID')
        ->addColumn('value', $options['type'], $options['length'], array(
            ), 'Value')
        ->addIndex(
            $this->getIdxName(
                array('easylife_news/article', $type),
                array('entity_id', 'attribute_id', 'store_id'),
                Varien_Db_Adapter_Interface::INDEX_TYPE_UNIQUE
            ),
            array('entity_id', 'attribute_id', 'store_id'),
            array('type' => Varien_Db_Adapter_Interface::INDEX_TYPE_UNIQUE))
        ->addIndex($this->getIdxName(array('easylife_news/article', $type), array('store_id')),
            array('store_id'))
        ->addIndex($this->getIdxName(array('easylife_news/article', $type), array('entity_id')),
            array('entity_id'))
        ->addIndex($this->getIdxName(array('easylife_news/article', $type), array('attribute_id')),
            array('attribute_id'))
        ->addForeignKey(
            $this->getFkName(
                array('easylife_news/article', $type),
                'attribute_id',
                'eav/attribute',
                'attribute_id'
            ),
            'attribute_id', $this->getTable('eav/attribute'), 'attribute_id',
            Varien_Db_Ddl_Table::ACTION_CASCADE, Varien_Db_Ddl_Table::ACTION_CASCADE)
        ->addForeignKey(
            $this->getFkName(
                array('easylife_news/article', $type),
                'entity_id',
                'easylife_news/article',
                'entity_id'
            ),
            'entity_id', $this->getTable('easylife_news/article'), 'entity_id',
            Varien_Db_Ddl_Table::ACTION_CASCADE, Varien_Db_Ddl_Table::ACTION_CASCADE)
        ->addForeignKey($this->getFkName(array('easylife_news/article', $type), 'store_id', 'core/store', 'store_id'),
            'store_id', $this->getTable('core/store'), 'store_id',
            Varien_Db_Ddl_Table::ACTION_CASCADE, Varien_Db_Ddl_Table::ACTION_CASCADE)
        ->setComment($options['comment']);
    $this->getConnection()->createTable($table);
}
//crete the news_eav_attribute (for additional attribute settings)
$table = $this->getConnection()
    ->newTable($this->getTable('easylife_news/eav_attribute'))
    ->addColumn('attribute_id', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(
        'identity'  => true,
        'nullable'  => false,
        'primary'   => true,
        ), 'Attribute ID')
    ->addColumn('is_global', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(), 'Attribute scope')
    ->addColumn('position', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(), 'Attribute position')
    ->addColumn('is_wysiwyg_enabled', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(), 'Attribute uses WYSIWYG')
    ->addColumn('is_visible', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(), 'Attribute is visible')
    ->setComment('News attribute table');
$this->getConnection()->createTable($table);

$this->installEntities();
$this->endSetup();

Modèles app/code/local/Easylife/News/Model/Observer.php - ajoutez le nouvel élément de menu dans le menu supérieur:

<?php
class Easylife_News_Model_Observer {
    public function addItemsToTopmenuItems($observer) {
        $menu = $observer->getMenu();
        $tree = $menu->getTree();
        $action = Mage::app()->getFrontController()->getAction()->getFullActionName();

        $articleNodeId = 'article';
        $data = array(
            'name' => Mage::helper('easylife_news')->__('Articles'),
            'id' => $articleNodeId,
            'url' => Mage::helper('easylife_news/article')->getArticlesUrl(),
            'is_active' => ($action == 'easylife_news_article_index' || $action == 'easylife_news_article_view')
        );
        $articleNode = new Varien_Data_Tree_Node($data, 'id', $tree, $menu);
        $menu->addChild($articleNode);
        return $this;
    }
}

app/code/local/Easylife/News/Model/Article.php - le modèle principal de l'article

<?php
class Easylife_News_Model_Article
    extends Mage_Catalog_Model_Abstract {
    const ENTITY    = 'easylife_news_article';
    const CACHE_TAG = 'easylife_news_article';
    protected $_eventPrefix = 'easylife_news_article';
    protected $_eventObject = 'article';
    public function _construct(){
        parent::_construct();
        $this->_init('easylife_news/article');
    }
    protected function _beforeSave(){
        parent::_beforeSave();
        $now = Mage::getSingleton('core/date')->gmtDate();
        if ($this->isObjectNew()){
            $this->setCreatedAt($now);
        }
        $this->setUpdatedAt($now);
        return $this;
    }
    public function getArticleUrl(){
        if ($this->getUrlKey()){
            $urlKey = '';
            if ($prefix = Mage::getStoreConfig('easylife_news/article/url_prefix')){
                $urlKey .= $prefix.'/';
            }
            $urlKey .= $this->getUrlKey();
            if ($suffix = Mage::getStoreConfig('easylife_news/article/url_suffix')){
                $urlKey .= '.'.$suffix;
            }
            return Mage::getUrl('', array('_direct'=>$urlKey));
        }
        return Mage::getUrl('easylife_news/article/view', array('id'=>$this->getId()));
    }
    public function checkUrlKey($urlKey, $active = true){
        return $this->_getResource()->checkUrlKey($urlKey, $active);
    }

    public function getDescription(){ //this needs to be implemented for all WYSIWYG attributes
        $description = $this->getData('description');
        $helper = Mage::helper('cms');
        $processor = $helper->getBlockTemplateProcessor();
        $html = $processor->filter($description);
        return $html;
    }
    public function getDefaultAttributeSetId() {
        return $this->getResource()->getEntityType()->getDefaultAttributeSetId();
    }
    public function getAttributeText($attributeCode) {
        $text = $this->getResource()
            ->getAttribute($attributeCode)
            ->getSource()
            ->getOptionText($this->getData($attributeCode));
        if (is_array($text)){
            return implode(', ',$text);
        }
        return $text;
    }
    public function getDefaultValues() {
        $values = array();
        $values['status'] = 1;
        $values['in_rss'] = 1;
        return $values;
    }
}

app/code/local/Easylife/News/Model/Resource/Article.php - le modèle de ressource pour l'article

<?php
class Easylife_News_Model_Resource_Article
    extends Mage_Catalog_Model_Resource_Abstract {
    public function __construct() {
        $resource = Mage::getSingleton('core/resource');
        $this->setType('easylife_news_article')
            ->setConnection(
                $resource->getConnection('article_read'),
                $resource->getConnection('article_write')
            );

    }
    public function getMainTable() {
        return $this->getEntityTable();
    }
    public function checkUrlKey($urlKey, $storeId, $active = true){
        $stores = array(Mage_Core_Model_App::ADMIN_STORE_ID, $storeId);
        $select = $this->_initCheckUrlKeySelect($urlKey, $stores);
        if (!$select){
            return false;
        }
        $select->reset(Zend_Db_Select::COLUMNS)
            ->columns('e.entity_id')
            ->limit(1);
        return $this->_getReadAdapter()->fetchOne($select);
    }
    protected function _initCheckUrlKeySelect($urlKey, $store){
        $urlRewrite = Mage::getModel('eav/config')->getAttribute('easylife_news_article', 'url_key');
        if (!$urlRewrite || !$urlRewrite->getId()){
            return false;
        }
        $table = $urlRewrite->getBackend()->getTable();
        $select = $this->_getReadAdapter()->select()
            ->from(array('e' => $table))
            ->where('e.attribute_id = ?', $urlRewrite->getId())
            ->where('e.value = ?', $urlKey)
            ->where('e.store_id IN (?)', $store)
            ->order('e.store_id DESC');
        return $select;
    }
}

app/code/local/Easylife/News/Model/Resource/Article/Collection.php - le modèle de collection

<?php
class Easylife_News_Model_Resource_Article_Collection
    extends Mage_Catalog_Model_Resource_Collection_Abstract {
    protected function _construct(){
        parent::_construct();
        $this->_init('easylife_news/article');
    }
    protected function _toOptionArray($valueField='entity_id', $labelField='title', $additional=array()){
        $this->addAttributeToSelect('title');
        return parent::_toOptionArray($valueField, $labelField, $additional);
    }
    protected function _toOptionHash($valueField='entity_id', $labelField='title'){
        $this->addAttributeToSelect('title');
        return parent::_toOptionHash($valueField, $labelField);
    }
    public function getSelectCountSql(){
        $countSelect = parent::getSelectCountSql();
        $countSelect->reset(Zend_Db_Select::GROUP);
        return $countSelect;
    }
}

Le code est trop long pour tenir dans une réponse. Le reste suivra .... attendez.

Partie 2 .

app/code/local/Easylife/News/Model/Attribute.php - le modèle pour les attributs de l'article

<?php
class Easylife_News_Model_Attribute
    extends Mage_Eav_Model_Entity_Attribute {
    const SCOPE_STORE                           = 0;
    const SCOPE_GLOBAL                          = 1;
    const SCOPE_WEBSITE                         = 2;
    const MODULE_NAME                           = 'Easylife_News';
    const ENTITY                                = 'easylife_news_eav_attribute';
    protected $_eventPrefix                     = 'easylife_news_entity_attribute';
    protected $_eventObject                     = 'attribute';
    static protected $_labels                   = null;
    protected function _construct(){
        $this->_init('easylife_news/attribute');
    }
    protected function _beforeSave(){
        $this->setData('modulePrefix', self::MODULE_NAME);
        if (isset($this->_origData['is_global'])) {
            if (!isset($this->_data['is_global'])) {
                $this->_data['is_global'] = self::SCOPE_GLOBAL;
            }
        }
        if ($this->getFrontendInput() == 'textarea') {
            if ($this->getIsWysiwygEnabled()) {
                $this->setIsHtmlAllowedOnFront(1);
            }
        }
        return parent::_beforeSave();
    }
    protected function _afterSave(){
        Mage::getSingleton('eav/config')->clear();
        return parent::_afterSave();
    }
    public function getIsGlobal(){
        return $this->_getData('is_global');
    }
    public function isScopeGlobal(){
        return $this->getIsGlobal() == self::SCOPE_GLOBAL;
    }
    public function isScopeWebsite(){
        return $this->getIsGlobal() == self::SCOPE_WEBSITE;
    }
    public function isScopeStore(){
        return !$this->isScopeGlobal() && !$this->isScopeWebsite();
    }
    public function getStoreId(){
        $dataObject = $this->getDataObject();
        if ($dataObject) {
            return $dataObject->getStoreId();
        }
        return $this->getData('store_id');
    }
    public function getSourceModel(){
        $model = $this->getData('source_model');
        if (empty($model)) {
            if ($this->getBackendType() == 'int' && $this->getFrontendInput() == 'select') {
                return $this->_getDefaultSourceModel();
            }
        }
        return $model;
    }
    public function getFrontendLabel(){
        return $this->_getData('frontend_label');
    }
    protected function _getLabelForStore(){
        return $this->getFrontendLabel();
    }
    public static function initLabels($storeId = null){
        if (is_null(self::$_labels)) {
            if (is_null($storeId)) {
                $storeId = Mage::app()->getStore()->getId();
            }
            $attributeLabels = array();
            $attributes = Mage::getResourceSingleton('catalog/product')->getAttributesByCode();
            foreach ($attributes as $attribute) {
                if (strlen($attribute->getData('frontend_label')) > 0) {
                    $attributeLabels[] = $attribute->getData('frontend_label');
                }
            }
            self::$_labels = Mage::app()->getTranslator()->getResource()->getTranslationArrayByStrings($attributeLabels, $storeId);
        }
    }
    public function _getDefaultSourceModel(){
        return 'eav/entity_attribute_source_table';
    }
}

app/code/local/Easylife/News/Model/Resource/Attribute.php - le modèle de ressource d'attribut

<?php
class Easylife_News_Model_Resource_Attribute
    extends Mage_Eav_Model_Resource_Entity_Attribute {
    protected  function _afterSave(Mage_Core_Model_Abstract $object){
        $setup       = Mage::getModel('eav/entity_setup', 'core_write');
        $entityType  = $object->getEntityTypeId();
        $setId       = $setup->getDefaultAttributeSetId($entityType);
        $groupId     = $setup->getDefaultAttributeGroupId($entityType);
        $attributeId = $object->getId();
        $sortOrder   = $object->getPosition();

        $setup->addAttributeToGroup($entityType, $setId, $groupId, $attributeId, $sortOrder);
        return parent::_afterSave($object);
    }
}

app/code/local/Easylife/News/Model/Resource/Eav/Attribute.php - le modèle de ressource EAV d'attribut

<?php
class Easylife_News_Model_Resource_Eav_Attribute
    extends Mage_Eav_Model_Entity_Attribute {
    const MODULE_NAME   = 'Easylife_News';
    const ENTITY        = 'easylife_news_eav_attribute';
    protected $_eventPrefix = 'easylife_news_entity_attribute';
    protected $_eventObject = 'attribute';
    static protected $_labels = null;
    protected function _construct() {
        $this->_init('easylife_news/attribute');
    }
    public function isScopeStore() {
        return $this->getIsGlobal() == Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE;
    }
    public function isScopeWebsite() {
        return $this->getIsGlobal() == Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_WEBSITE;
    }
    public function isScopeGlobal() {
        return (!$this->isScopeStore() && !$this->isScopeWebsite());
    }
    public function getBackendTypeByInput($type) {
        switch ($type){
            case 'file':
                //intentional fallthrough
            case 'image':
                return 'varchar';
                break;
            default:
                return parent::getBackendTypeByInput($type);
            break;
        }
    }
    protected function _beforeDelete(){
        if (!$this->getIsUserDefined()){
            throw new Mage_Core_Exception(Mage::helper('easylife_news')->__('This attribute is not deletable'));
        }
        return parent::_beforeDelete();
    }
}

app/code/local/Easylife/News/Model/Resource/Article/Collection.php - modèle de collection d'attributs

<?php
class Easylife_News_Model_Resource_Article_Attribute_Collection
    extends Mage_Eav_Model_Resource_Entity_Attribute_Collection {
    protected function _initSelect() {
            $this->getSelect()->from(array('main_table' => $this->getResource()->getMainTable()))
                ->where('main_table.entity_type_id=?', Mage::getModel('eav/entity')->setType('easylife_news_article')->getTypeId())
                ->join(
                    array('additional_table' => $this->getTable('easylife_news/eav_attribute')),
                    'additional_table.attribute_id=main_table.attribute_id'
                );
        return $this;
    }
    public function setEntityTypeFilter($typeId) {
        return $this;
    }
    public function addVisibleFilter() {
        return $this->addFieldToFilter('additional_table.is_visible', 1);
    }
    public function addEditableFilter() {
        return $this->addFieldToFilter('additional_table.is_editable', 1);
    }
}

app/code/local/Easylife/News/Model/Resource/Setup.php - le modèle de ressource d'installation - utilisé pour l'ajout d'entités et d'attributs:

<?php
class Easylife_News_Model_Resource_Setup
    extends Mage_Catalog_Model_Resource_Setup {
    public function getDefaultEntities(){
    $entities = array();
        $entities['easylife_news_article'] = array(
            'entity_model'                  => 'easylife_news/article',
            'attribute_model'               => 'easylife_news/resource_eav_attribute',
            'table'                         => 'easylife_news/article',
            'additional_attribute_table'    => 'easylife_news/eav_attribute',
            'entity_attribute_collection'   => 'easylife_news/article_attribute_collection',
            'attributes'        => array(
                    'title' => array(
                        'group'          => 'General',
                        'type'           => 'varchar',
                        'backend'        => '',
                        'frontend'       => '',
                        'label'          => 'Title',
                        'input'          => 'text',
                        'source'         => '',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '1',
                        'user_defined'   => false,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '10',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),
                    'short_description' => array(
                        'group'          => 'General',
                        'type'           => 'text',
                        'backend'        => '',
                        'frontend'       => '',
                        'label'          => 'Short description',
                        'input'          => 'textarea',
                        'source'         => '',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '1',
                        'user_defined'   => true,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '20',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),
                    'description' => array(
                        'group'          => 'General',
                        'type'           => 'text',
                        'backend'        => '',
                        'frontend'       => '',
                        'label'          => 'Description',
                        'input'          => 'textarea',
                        'source'         => '',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '1',
                        'user_defined'   => true,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '30',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '1',
                    ),
                    'publish_date' => array(
                        'group'          => 'General',
                        'type'           => 'datetime',
                        'backend'        => 'eav/entity_attribute_backend_datetime',
                        'frontend'       => '',
                        'label'          => 'Publish Date',
                        'input'          => 'date',
                        'source'         => '',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
                        'required'       => '1',
                        'user_defined'   => true,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '40',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),
                    'status' => array(
                        'group'          => 'General',
                        'type'           => 'int',
                        'backend'        => '',
                        'frontend'       => '',
                        'label'          => 'Enabled',
                        'input'          => 'select',
                        'source'         => 'eav/entity_attribute_source_boolean',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '',
                        'user_defined'   => false,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '50',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),
                    'url_key' => array(
                        'group'          => 'General',
                        'type'           => 'varchar',
                        'backend'        => 'easylife_news/article_attribute_backend_urlkey',
                        'frontend'       => '',
                        'label'          => 'URL key',
                        'input'          => 'text',
                        'source'         => '',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '',
                        'user_defined'   => false,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '60',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),
                    'in_rss' => array(
                        'group'          => 'General',
                        'type'           => 'int',
                        'backend'        => '',
                        'frontend'       => '',
                        'label'          => 'In RSS',
                        'input'          => 'select',
                        'source'         => 'eav/entity_attribute_source_boolean',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '',
                        'user_defined'   => false,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '70',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),
                    'meta_title' => array(
                        'group'          => 'General',
                        'type'           => 'varchar',
                        'backend'        => '',
                        'frontend'       => '',
                        'label'          => 'Meta title',
                        'input'          => 'text',
                        'source'         => '',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '',
                        'user_defined'   => false,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '80',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),
                    'meta_keywords' => array(
                        'group'          => 'General',
                        'type'           => 'text',
                        'backend'        => '',
                        'frontend'       => '',
                        'label'          => 'Meta keywords',
                        'input'          => 'textarea',
                        'source'         => '',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '',
                        'user_defined'   => false,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '90',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),
                    'meta_description' => array(
                        'group'          => 'General',
                        'type'           => 'text',
                        'backend'        => '',
                        'frontend'       => '',
                        'label'          => 'Meta description',
                        'input'          => 'textarea',
                        'source'         => '',
                        'global'         => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
                        'required'       => '',
                        'user_defined'   => false,
                        'default'        => '',
                        'unique'         => false,
                        'position'       => '100',
                        'note'           => '',
                        'visible'        => '1',
                        'wysiwyg_enabled'=> '0',
                    ),

                )
        );
        return $entities;
    }
}

app/code/local/Easylife/News/Model/Article/Attribute/Backend/File.php - backend pour les attributs de fichier si vous décidez d'en ajouter un

<?php
class Easylife_News_Model_Article_Attribute_Backend_File
    extends Mage_Eav_Model_Entity_Attribute_Backend_Abstract {
    public function afterSave($object){
        $value = $object->getData($this->getAttribute()->getName());

        if (is_array($value) && !empty($value['delete'])) {
            $object->setData($this->getAttribute()->getName(), '');
            $this->getAttribute()->getEntity()
                ->saveAttribute($object, $this->getAttribute()->getName());
            return;
        }

        $path = Mage::helper('easylife_news/article')->getFileBaseDir();

        try {
            $uploader = new Varien_File_Uploader($this->getAttribute()->getName());
            //set allowed file extensions if you need
            //$uploader->setAllowedExtensions(array('mp4', 'mov', 'f4v', 'flv', '3gp', '3g2', 'mp3', 'aac', 'm4a', 'swf'));
            $uploader->setAllowRenameFiles(true);
            $uploader->setFilesDispersion(true);
            $result = $uploader->save($path);
            $object->setData($this->getAttribute()->getName(), $result['file']);
            $this->getAttribute()->getEntity()->saveAttribute($object, $this->getAttribute()->getName());
        } catch (Exception $e) {
            if ($e->getCode() != 666){
                //throw $e;
            }
            return;
        }
    }
}

app/code/local/Easylife/News/Model/Article/Attribute/Backend/Image.php - backend pour les attributs d'image si vous décidez d'en ajouter un

<?php
class Easylife_News_Model_Article_Attribute_Backend_Image
    extends Mage_Eav_Model_Entity_Attribute_Backend_Abstract {
    public function afterSave($object){
        $value = $object->getData($this->getAttribute()->getName());

        if (is_array($value) && !empty($value['delete'])) {
            $object->setData($this->getAttribute()->getName(), '');
            $this->getAttribute()->getEntity()
                ->saveAttribute($object, $this->getAttribute()->getName());
            return;
        }

        $path = Mage::helper('easylife_news/article_image')->getImageBaseDir();

        try {
            $uploader = new Varien_File_Uploader($this->getAttribute()->getName());
            $uploader->setAllowRenameFiles(true);
            $uploader->setFilesDispersion(true);
            $result = $uploader->save($path);
            $object->setData($this->getAttribute()->getName(), $result['file']);
            $this->getAttribute()->getEntity()->saveAttribute($object, $this->getAttribute()->getName());
        } catch (Exception $e) {
            if ($e->getCode() != 666){
                //throw $e;
            }
            return;
        }
    }
}

app/code/local/Easylife/News/Model/Article/Attribute/Backend/Urlkey.php - backend pour l'attribut clé url

<?php
class Easylife_News_Model_Article_Attribute_Backend_Urlkey
    extends Mage_Eav_Model_Entity_Attribute_Backend_Abstract {
    public function beforeSave($object) {
        $attributeName = $this->getAttribute()->getName();
        $urlKey = $object->getData($attributeName);
        if ($urlKey == '') {
            $urlKey = $object->getTitle();
        }
        $urlKey = $this->formatUrlKey($urlKey);
        $validKey = false;
        while (!$validKey) {
            $entityId = Mage::getResourceModel('easylife_news/article')->checkUrlKey($urlKey, $object->getStoreId(), false);
            if ($entityId == $object->getId() || empty($entityId)) {
                $validKey = true;
            }
            else {
                $parts = explode('-', $urlKey);
                $last = $parts[count($parts) - 1];
                if (!is_numeric($last)){
                    $urlKey = $urlKey.'-1';
                }
                else {
                    $suffix = '-'.($last + 1);
                    unset($parts[count($parts) - 1]);
                    $urlKey = implode('-', $parts).$suffix;
                }
            }
        }
        $object->setData($attributeName, $urlKey);
        return $this;
    }
    public function formatUrlKey($str) {
        $urlKey = preg_replace('#[^0-9a-z]+#i', '-', Mage::helper('catalog/product_url')->format($str));
        $urlKey = strtolower($urlKey);
        $urlKey = trim($urlKey, '-');
        return $urlKey;
    }
}

app/code/local/Easylife/News/Model/Adminhtml/Search/Article.php - modèle qui gère la recherche globale de l'administrateur

<?php
class Easylife_News_Model_Adminhtml_Search_Article
    extends Varien_Object {
    public function load(){
        $arr = array();
        if (!$this->hasStart() || !$this->hasLimit() || !$this->hasQuery()) {
            $this->setResults($arr);
            return $this;
        }
        $collection = Mage::getResourceModel('easylife_news/article_collection')
            ->addAttributeToFilter('title', array('like' => $this->getQuery().'%'))
            ->setCurPage($this->getStart())
            ->setPageSize($this->getLimit())
            ->load();
        foreach ($collection->getItems() as $article) {
            $arr[] = array(
                'id'=> 'article/1/'.$article->getId(),
                'type'  => Mage::helper('easylife_news')->__('Article'),
                'name'  => $article->getTitle(),
                'description'   => $article->getTitle(),
                'url' => Mage::helper('adminhtml')->getUrl('*/news_article/edit', array('id'=>$article->getId())),
            );
        }
        $this->setResults($arr);
        return $this;
    }
}

Nous en avons fini avec les modèles. Passons aux blocs .
app/code/local/Easylife/News/Block/Rss.php- le bloc général rss

<?php 
class Easylife_News_Block_Rss
    extends Mage_Core_Block_Template {
    protected $_feeds = array();
    public function addFeed($label, $url, $prepare = false) {
        $link = ($prepare ? $this->getUrl($url) : $url);
        $feed = new Varien_Object();
        $feed->setLabel($label);
        $feed->setUrl($link);
        $this->_feeds[$link] = $feed;
        return $this;
    }
    public function getFeeds() {
        return $this->_feeds;
    }
}

app/code/local/Easylife/News/Block/Adminhtml/Article.php - le bloc d'article principal

<?php
class Easylife_News_Block_Adminhtml_Article
    extends Mage_Adminhtml_Block_Widget_Grid_Container {
    public function __construct(){
        $this->_controller         = 'adminhtml_article';
        $this->_blockGroup         = 'easylife_news';
        parent::__construct();
        $this->_headerText         = Mage::helper('easylife_news')->__('Article');
        $this->_updateButton('add', 'label', Mage::helper('easylife_news')->__('Add Article'));

        $this->setTemplate('easylife_news/grid.phtml');
    }
}

app/code/local/Easylife/News/Block/Adminhtml/Article/Edit.php - le formulaire d'édition admin

<?php
class Easylife_News_Block_Adminhtml_Article_Edit
    extends Mage_Adminhtml_Block_Widget_Form_Container {
    public function __construct(){
        parent::__construct();
        $this->_blockGroup = 'easylife_news';
        $this->_controller = 'adminhtml_article';
        $this->_updateButton('save', 'label', Mage::helper('easylife_news')->__('Save Article'));
        $this->_updateButton('delete', 'label', Mage::helper('easylife_news')->__('Delete Article'));
        $this->_addButton('saveandcontinue', array(
            'label'        => Mage::helper('easylife_news')->__('Save And Continue Edit'),
            'onclick'    => 'saveAndContinueEdit()',
            'class'        => 'save',
        ), -100);
        $this->_formScripts[] = "
            function saveAndContinueEdit(){
                editForm.submit($('edit_form').action+'back/edit/');
            }
        ";
    }
    public function getHeaderText(){
        if( Mage::registry('current_article') && Mage::registry('current_article')->getId() ) {
            return Mage::helper('easylife_news')->__("Edit Article '%s'", $this->escapeHtml(Mage::registry('current_article')->getTitle()));
        }
        else {
            return Mage::helper('easylife_news')->__('Add Article');
        }
    }
}

On dirait qu'il y aura une partie 3 .....

Partie 3.
app/code/local/Easylife/News/Block/Adminhtml/Article/Grid.php - la grille d'administration

<?php
class Easylife_News_Block_Adminhtml_Article_Grid
    extends Mage_Adminhtml_Block_Widget_Grid {
    public function __construct(){
        parent::__construct();
        $this->setId('articleGrid');
        $this->setDefaultSort('entity_id');
        $this->setDefaultDir('ASC');
        $this->setSaveParametersInSession(true);
        $this->setUseAjax(true);
    }
    protected function _prepareCollection(){
        $collection = Mage::getModel('easylife_news/article')->getCollection()
            ->addAttributeToSelect('publish_date')
            ->addAttributeToSelect('status')
            ->addAttributeToSelect('url_key');
        $adminStore = Mage_Core_Model_App::ADMIN_STORE_ID;
        $store = $this->_getStore();
        $collection->joinAttribute('title', 'easylife_news_article/title', 'entity_id', null, 'inner', $adminStore);
        if ($store->getId()) {
            $collection->joinAttribute('easylife_news_article_title', 'easylife_news_article/title', 'entity_id', null, 'inner', $store->getId());
        }

        $this->setCollection($collection);
        return parent::_prepareCollection();
    }
    protected function _prepareColumns(){
        $this->addColumn('entity_id', array(
            'header'    => Mage::helper('easylife_news')->__('Id'),
            'index'        => 'entity_id',
            'type'        => 'number'
        ));
        $this->addColumn('title', array(
            'header'    => Mage::helper('easylife_news')->__('Title'),
            'align'     => 'left',
            'index'     => 'title',
        ));
        if ($this->_getStore()->getId()){
            $this->addColumn('easylife_news_article_title', array(
                'header'    => Mage::helper('easylife_news')->__('Title in %s', $this->_getStore()->getName()),
                'align'     => 'left',
                'index'     => 'easylife_news_article_title',
            ));
        }

        $this->addColumn('status', array(
            'header'    => Mage::helper('easylife_news')->__('Status'),
            'index'        => 'status',
            'type'        => 'options',
            'options'    => array(
                '1' => Mage::helper('easylife_news')->__('Enabled'),
                '0' => Mage::helper('easylife_news')->__('Disabled'),
            )
        ));
        $this->addColumn('publish_date', array(
            'header'=> Mage::helper('easylife_news')->__('Publish Date'),
            'index' => 'publish_date',
            'type'=> 'date',

        ));
        $this->addColumn('url_key', array(
            'header' => Mage::helper('easylife_news')->__('URL key'),
            'index'  => 'url_key',
        ));
        $this->addColumn('created_at', array(
            'header'    => Mage::helper('easylife_news')->__('Created at'),
            'index'     => 'created_at',
            'width'     => '120px',
            'type'      => 'datetime',
        ));
        $this->addColumn('updated_at', array(
            'header'    => Mage::helper('easylife_news')->__('Updated at'),
            'index'     => 'updated_at',
            'width'     => '120px',
            'type'      => 'datetime',
        ));
        $this->addColumn('action',
            array(
                'header'=>  Mage::helper('easylife_news')->__('Action'),
                'width' => '100',
                'type'  => 'action',
                'getter'=> 'getId',
                'actions'   => array(
                    array(
                        'caption'   => Mage::helper('easylife_news')->__('Edit'),
                        'url'   => array('base'=> '*/*/edit'),
                        'field' => 'id'
                    )
                ),
                'filter'=> false,
                'is_system'    => true,
                'sortable'  => false,
        ));
        $this->addExportType('*/*/exportCsv', Mage::helper('easylife_news')->__('CSV'));
        $this->addExportType('*/*/exportExcel', Mage::helper('easylife_news')->__('Excel'));
        $this->addExportType('*/*/exportXml', Mage::helper('easylife_news')->__('XML'));
        return parent::_prepareColumns();
    }

    protected function _getStore(){
        $storeId = (int) $this->getRequest()->getParam('store', 0);
        return Mage::app()->getStore($storeId);
    }

    protected function _prepareMassaction(){
        $this->setMassactionIdField('entity_id');
        $this->getMassactionBlock()->setFormFieldName('article');
        $this->getMassactionBlock()->addItem('delete', array(
            'label'=> Mage::helper('easylife_news')->__('Delete'),
            'url'  => $this->getUrl('*/*/massDelete'),
            'confirm'  => Mage::helper('easylife_news')->__('Are you sure?')
        ));
        $this->getMassactionBlock()->addItem('status', array(
            'label'=> Mage::helper('easylife_news')->__('Change status'),
            'url'  => $this->getUrl('*/*/massStatus', array('_current'=>true)),
            'additional' => array(
                'status' => array(
                        'name' => 'status',
                        'type' => 'select',
                        'class' => 'required-entry',
                        'label' => Mage::helper('easylife_news')->__('Status'),
                        'values' => array(
                                '1' => Mage::helper('easylife_news')->__('Enabled'),
                                '0' => Mage::helper('easylife_news')->__('Disabled'),
                        )
                )
            )
        ));
        return $this;
    }

    public function getRowUrl($row){
        return $this->getUrl('*/*/edit', array('id' => $row->getId()));
    }
    public function getGridUrl(){
        return $this->getUrl('*/*/grid', array('_current'=>true));
    }
}

app/code/local/Easylife/News/Block/Adminhtml/Article/Edit/Tabs.php - les onglets dans le formulaire d'ajout / modification

<?php
class Easylife_News_Block_Adminhtml_Article_Edit_Tabs
    extends Mage_Adminhtml_Block_Widget_Tabs {
    public function __construct() {
        parent::__construct();
        $this->setId('article_info_tabs');
        $this->setDestElementId('edit_form');
        $this->setTitle(Mage::helper('easylife_news')->__('Article Information'));
    }
    protected function _prepareLayout(){
        $article = $this->getArticle();
        $entity = Mage::getModel('eav/entity_type')->load('easylife_news_article', 'entity_type_code');
        $attributes = Mage::getResourceModel('eav/entity_attribute_collection')
                ->setEntityTypeFilter($entity->getEntityTypeId());
        $attributes->addFieldToFilter('attribute_code', array('nin'=>array('meta_title', 'meta_description', 'meta_keywords')));
        $attributes->getSelect()->order('additional_table.position', 'ASC');

        $this->addTab('info', array(
            'label'     => Mage::helper('easylife_news')->__('Article Information'),
            'content'   => $this->getLayout()->createBlock('easylife_news/adminhtml_article_edit_tab_attributes')
                            ->setAttributes($attributes)
                            ->toHtml(),
        ));
        $seoAttributes = Mage::getResourceModel('eav/entity_attribute_collection')
                ->setEntityTypeFilter($entity->getEntityTypeId())
                ->addFieldToFilter('attribute_code', array('in'=>array('meta_title', 'meta_description', 'meta_keywords')));
        $seoAttributes->getSelect()->order('additional_table.position', 'ASC');

        $this->addTab('meta', array(
            'label'     => Mage::helper('easylife_news')->__('Meta'),
            'title'     => Mage::helper('easylife_news')->__('Meta'),
            'content'   => $this->getLayout()->createBlock('easylife_news/adminhtml_article_edit_tab_attributes')
                            ->setAttributes($seoAttributes)
                            ->toHtml(),
        ));
        return parent::_beforeToHtml();
    }
    public function getArticle(){
        return Mage::registry('current_article');
    }
}