Magento - Add attribute to customer entity

Question

For two days I have been trying to add new customer attribute to the magento database. But it isn\'t working. I added a simple nickname input field

Answer 1

I edited your script and it worked fine for me, I can see new attribute in backed now.

Replace this:

$installer = $this;
$installer->startSetup();

$setup = new Mage_Eav_Model_Entity_Setup('core_setup');

With this:

$setup = new Mage_Eav_Model_Entity_Setup('core_setup');
$setup->startSetup();