Display a value attribute instead id in backoffice product management - magento

Question

I add an attribute in product management in the backoffice (dropdown list)and I want to show the value instead of id.
here is the solution now it works i updated it :)
Grid.phtml
protected function _prepareCollection()
{
...
$collection->addAttributeToSelect('manufacturer'); //my add attribute
...
}
protected function _prepareColumns()
{
// add this code
$attribute = Mage::getModel('eav/config')->getAttribute('catalog_product', 'manufacturer');
$options = $attribute->getSource()->getAllOptions(false);
$values = array();
foreach ($options as $option){
$values[$option['value']] = $option['label'];
}
$this->addColumn('manufacturer', //my add attribute
array(
'header'=> 'Manufacturer',
'width' => '100px',
'index' => 'manufacturer',
'type' => 'options',
'options' => $values,
));

Answer 1

Take a look into Mage_Adminhtml_Block_Catalog_Product_Grid::_prepareCollection() there are many attributes with addColumn.
You should customize the options index with the possible values.
There is a great tutorial in http://www.demacmedia.com/magento-commerce/mini-tutorial-adding-custom-attributes-to-the-backend-product-grid/
In resume you should use the following code.
protected function _getAttributeOptions($attribute_code)
{
$attribute = Mage::getModel('eav/config')->getAttribute('catalog_product', $attribute_code);
$options = array();
foreach( $attribute->getSource()->getAllOptions(true, true) as $option ) {
$options[$option['value']] = $option['label'];
}
return $options;
}
And now lets update our addColumn functions to the following:
$this->addColumn('manufacturer', //my add attribute
array(
'header'=> Mage::helper('catalog')->__('Manufacturer'),
'width' => '100px',
'index' => 'manufacturer',
'type' => 'text',
'options' => $this->_getAttributeOptions('attribute_code'),
));

Answer 2

For getting attribute just use
$attribute = Mage::getSingleton('eav/config')->getAttribute(Mage_Catalog_Model_Product::ENTITY, 'manufacturer');
instead of yours!