I have created custom product multiselect attribute successfully.

But when i edit the product in admin and selecting some options(countries) of my multiselect attribute and if i click save its saved successfully.

but when i open same product again its not showing before selected options.that means its not saving my custom product attribute to product model.

can you Please help anyone.I'm very tired.and i tried lot of hours.then i'm placing here.

etc/config.xml file




$installer = $this;
/* @var $installer Mage_Catalog_Model_Resource_Eav_Mysql4_Setup */

        'group'             => 'General',
        'type'              => 'varchar',
        'backend'           => '',
        'user_defined' => '1',
        'frontend'          => '',
        'label'             => 'Shipping Restricted Countries',
        'input'             => 'multiselect',
        'source'            => 'Mage_Catalog_Model_Product_Attribute_Source_Countryofmanufacture',
        'global'            => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_WEBSITE


$installer->updateAttribute('catalog_product', 'custom_countries', 'backend_model', '');

1 Answer 1


You're setting the backend_model to '' it should be 'eav/entity_attribute_backend_array'

And you'll want to define the type as text not varchar, since varchar will have lower limit than what is required of the source model.

Take a look around the eav_attribute table for reference.

Hope this helps.

  • I think it is just 'backend' instead of 'backend_model'
    – Aphroz
    Commented Mar 14, 2015 at 8:28
  • 4
    If you are using addAttribute in setup scripts, it's "backend". In all other cases (updateAttribute or directly in the database), it's "backend_model". Commented Jun 17, 2016 at 12:26
  • 1
    perfect answer with nice explanation!!! +1 :) Commented Mar 6, 2018 at 11:39
  • How to set value programatically? Commented Feb 1, 2019 at 4:34
  • @jafarpinjar which value are you trying to set specifically?
    – B00MER
    Commented Feb 6, 2019 at 16:39

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