I actually can add a category via setup script, the thing is for some reason some of the fields doesn\'t get set properly. Here\'s is my code
$this->start
I finally found it, I'm not sure why but those fields are not showing up properly because they were inserted for the default store (storeId=1) because my script is running in an update script. You need to use the storeId 0.
With this information you would think that the solution would be something like :
$this->startSetup();
Mage::register('isSecureArea', 1);
Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);
$category = Mage::getModel('catalog/category');
$category->setPath('1/2') // set parent to be root category
->setStoreId(Mage_Core_Model_App::ADMIN_STORE_ID)
->setName('Category Name')
...
->save();
$this->endSetup();
But this code doesn't work either. Indeed after looking into Mage::app() (Mage_Core_Model_App Line 804) I noticed a IF condition that would always return the default store if you're in a setup script.
The trick is to fake that you're not in a setup script, my working solution is:
$this->startSetup();
Mage::register('isSecureArea', 1);
// Force the store to be admin
Mage::app()->setUpdateMode(false);
Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);
$category = Mage::getModel('catalog/category');
$category->setPath('1/2') // set parent to be root category
->setStoreId(Mage_Core_Model_App::ADMIN_STORE_ID)
->setName('Category Name')
...
->save();
$this->endSetup();