Display a client attribute with several parameters in the administrator's admin grid

Question

Okay, so with the Customer attributes, I have a choice of several options that I added to the Client Network Management panel.

    $prodCode = Mage::getSingleton('eav/config')->getAttribute('customer','prod_codes');
    $prodCodeOptions = $prodCode->getSource()->getAllOptions(false);
    $prodOptions = array();

    foreach($prodCodeOptions as $k)
        $prodOptions[$k['value']] = $k['label'];

    $this->addColumn('prod_codes', array(
        'header'    =>  Mage::helper('customer')->__('Product Code'),
        'width'     =>  '100',
        'index'     =>  'prod_codes',
        'type'      =>  'options',
        'options'   =>  $prodOptions,
        'filter_condition_callback'
                    => array($this, '_filterProdOptionsCondition'),
    ));

I have my attribute added to the collection at the top of my Grid.php:

->addAttributeToSelect('prod_codes')

Here is my method _filterProdOptionsCondition:

protected function _filterProdOptionsCondition($collection, $column) {
    if(!$value = $column->getFilter()->getValue()) {
        return;
    }
    $this->getCollection()->addFieldToFilter('prod_codes', array('finset' => $value));
    #print($collection->getSelectSql());
}

Now this work is fine and dandy, if I have only ONE of the selected options, as soon as I apply several attributes to the client, I will get empty results in the admin grid, however this IS is still searchable.

In close contact with print($collection->getSelectSql());no comment, I can see that the attribute identifier values ​​are returned in a comma-separated list.

Magento , ? ? !

Answer 1

, , , , , multioptions, .

//​​//Adminhtml//////Options.php

public function render(Varien_Object $row)
{
    $options = $this->getColumn()->getOptions();
    $showMissingOptionValues = (bool)$this->getColumn()->getShowMissingOptionValues();
    if (!empty($options) && is_array($options)) {
        $value = $row->getData($this->getColumn()->getIndex());
        if (is_array($value)) {
            $res = array();
            foreach ($value as $item) {
                if (isset($options[$item])) {
                    $res[] = $options[$item];
                }
                elseif ($showMissingOptionValues) {
                    $res[] = $item;
                }
            }
            return implode(', ', $res);
        }
        elseif (isset($options[$value])) {
            return $options[$value];
        } elseif (is_string($value)) { // <--- MY CHANGES HERE
            $values = explode(',', $value);
            $returnOptions = "";
            foreach($values as $k=>$v) {
                $returnOptions .= $options[$v]. ", ";
            }
            return substr($returnOptions, 0, -2);
        }
        return '';
    }
}