In magento 1.9 I need to set the default qty value to 100 and Stock Availability to blank while creating a duplicate product.

So when a user duplicates a product, he should see qty value as 100 and Stock Availability as blank within inventory tab.

1 Answer 1


To achieve this I have copied the following file app/code/core/Mage/Catalog/Model/Product.php to app/code/local/Mage/Catalog/Model/Product.php

And added the following code inside duplicate() method just before $newProduct->save(); line:

          'is_in_stock' => 3, 
          'qty' => 100,

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