Magento 2 Decrease stock when invoice is placed [closed]

Question

I want change product stock when invoice is placed, not change when order is placed. Thanks everybody!

Answer 1

By default Magento provides this configuration for decrease stock from store > config > Catalog > Inventory > Stock Options (Magento 2)

And to decrease the stock on Invoice you can use event sales_order_invoice_save_after.

Answer 2

Stock reduction is done in Mage_CatalogInventory_Model_Observer . So to do it first we will have to stop quantity decrement. To do this go to method public function subtractQuoteInventory(Varien_Event_Observer $observer){} in your rewritten observer and add below code

$items = $this->_getProductsQty($quote->getAllItems());
Mage::getSingleton('cataloginventory/stock')->revertProductsSale($items);

Now you will have to hook event sales_order_save_after and in that observer you may reduce the stock When does Magento decrement quantity This will help you in case you want to understand the decrement process