Creating new options for Magento attributes

Question

I’m having problems trying to create new options in the "Manage Options" tab. When creating an attribute, I already know how to save the data correctly in the database. I am overwriting Mage_Adminhtml_Block_Catalog_Product_Attribute_Edit_Tab_Optionswith my module to create custom fields.

My module:

config.xml

<config>
        <blocks>
            <adminhtml>
                <rewrite>
                     <catalog_product_attribute_edit_tabs>Ceicom_Swatches_Block_Adminhtml_Tabs</catalog_product_attribute_edit_tabs>
                     <catalog_product_attribute_edit_tab_options>Ceicom_Swatches_Block_Adminhtml_Options</catalog_product_attribute_edit_tab_options>
                 </rewrite>
             </adminhtml>
        </blocks>
</config>

Ceicom/Swatches/Block/Adminhtml/Options.php

class Ceicom_Swatches_Block_Adminhtml_Options extends Mage_Adminhtml_Block_Catalog_Product_Attribute_Edit_Tab_Options
{
    public function __construct()
    {
        parent::__construct();
        $this->setTemplate('ceicom/attribute/options.phtml');
    }
}

In the phtml file I put in the custom fields:

So everything indicates to do this need to be added new columns in the table eav_attribute_option. For example, campo_1, campo_2.

To save the additional fields I need to rewrite Mage_Eav_Model_Resource_Entity_Attribute::_saveOption().

Any hint on how to do this without changing the core in the same way I did above using rewrite, and how to load database data for inputs when editing the attribute?

Answer 1

You can rewrite Eav/entity_attribute using another model.

To do this add in config.xml

<global>
    ...
    <models>
        ...
        <eav_resource>
            <rewrite>
                <entity_attribute>Seumodulo_Model_Eav_Resource_Entity_Attribute</entity_attribute>
            </rewrite>
        </eav_resource>
        ...
    </models>
    ...
</global>

Create your file in

/app/code/local/Seumodulo/Eav/Model/Resource/Entity/Attribute.php

and use the class signature like this

class Seumodulo_Eav_Model_Resource_Entity_Attribute extends Mage_Core_Model_Resource_Db_Abstract {
    ...
}

Make sure you have cleared the cache configuration, and check that the module is showing up in System->Configuration->Advanced->Disable Modules Output

Test like this to see if it worked

echo get_class(Mage::getResourceModel('eav/entity_attribute'));

To save you can override the methods that enable actions before and after saving. They are

Mage_Catalog_Model_Resource_Attribute::_beforeSave()
Mage_Catalog_Model_Resource_Attribute::_afterSave()

in place of

Mage_Eav_Model_Resource_Entity_Attribute::_saveOption()

So you won’t have to worry about the original code.

See some examples in the links

• Example 01
• Example 02

--

As the resolution of the problem evolves in the comments, it is concluded that the method that should be overwritten is the catalog_entity_attribute_save_before