I have created a custom column for associated products (basically every simple product will have that column under "associated products" tab of configurable product). I store information of this field/column into an attribute which belong to configurable product instead of each simple product.

Below is the code for adding a column;




public function addPositionColumn(Varien_Event_Observer $observer)
    $block = $observer->getEvent()->getBlock();
    if ($block instanceof Mage_Adminhtml_Block_Catalog_Product_Edit_Tab_Super_Config_Grid) {
        if (!$block->isReadonly()) {
                    'header'     => Mage::helper('jsonproductinfo')->__('Position'),
                    'type'      => 'input',
                    'name'      => 'position_simple',
                    'index'     => 'position_simple',
                    'sortable'  => false,

With above code I am able to add the column into a require grid. And I am also able to save the information which I put inside that column (which is basically an attribute). The only problem I am facing is, I am unable to display the stored information into that column again (If I edit the product). I have also created another observer of type eav_collection_abstract_load_befor but no luck so far. Below is the code for it:




public function addPositionToCatalogProductCollection($observer)
    $collection = $observer->getEvent()->getCollection();
    if (!isset($collection)) {

I would be grateful if someone can point to the mistake or guide me how can I display back that information again into that column.


And here is the code which creates the "postion_simple".

        'group'             => 'General',
        'type'              => 'varchar',
        'input'             => 'hidden',
        'backend'           => '',
        'frontend'          => '',
        'label'             => 'Simple Position',
        'class'             => '',
        'source'            => '',
        'global'            => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
        'visible'           => true,
        'required'          => false,
        'user_defined'      => true,
        'default'           => '',
        'searchable'        => false,
        'filterable'        => false,
        'comparable'        => false,
        'visible_on_front'   => false,
        'visible_in_advanced_search'   => false,
        'unique'            => false,
        'apply_to'          => Mage_Catalog_Model_Product_Type::TYPE_CONFIGURABLE,
        'is_configurable'   => false,
  • have you checked that your observer is working ? check by printing query in your observer.echo $collection->getSelect(); – Minesh Patel Dec 7 '15 at 5:17
  • @MineshPatel, Yes, the observer is working. I was already sure about it but still checked it by printing the query. – Capri82 Dec 7 '15 at 12:44
  1. change 'index' => 'position_simple' to 'index' => 'entity_id' in your Observer.php (function addPositionColumn)
  2. you need to get value of your position_simple attribute from configurable product and use it in added column - one way to do that:

create function in Observer.php

protected function _getDefaultConfigurationId() {
    /** @var Mage_Catalog_Model_Product $product */
    $product = Mage::registry('current_product');
    if ($product) {
        return array($product->getData('position_simple'));
    return '';

and use that in your addPositionColumn function like that:

'values' => $this->_getDefaultConfigurationId(),

After that, there is no need of observer type eav_collection_abstract_load_befor at all.

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