Odoo Decrease Product Quantity Programmatically

Question

I have created a custom module where there is a field related to product. When the user checkout the product in the custom module, I want to decrease the quantity of product in the override create method. How to achieve this?

Answer 1

Finally, I found the solution code

warehouse = self.env['stock.warehouse'].search(
    [('company_id', '=', self.env.company.id)], limit=1
)

self.env['stock.quant'].with_context(inventory_mode=True).create({
    'product_id': product_id,
    'location_id': warehouse.lot_stock_id.id,
    'inventory_quantity': new_quantity,
})