Greetings,
i created my own module , which will add one2many field to product.product ,this one2many will have 'size' column .
now i created other one2many field in stock.move which has the same column 'size' , i want to subtract the stock.move.size with product.product.size (stock.move.size - product.product.size)
so from the stock.move form how can i update the value of 'size' which is on the product.product
Any help will be appreciated .