https://www.whiletrue.it/update-prestashop-product-quantities-csv-file/
I have PS 1.6.23. I tried this code, but it does not work for me correctly. The main quantity of combinations is always increased by the quantity from the CSV file, and it is not equal with the sum of the combinations quantity. I cannot reset all quantities to zero as my CSV file contains only the changes, not the full stock.
How do I fix this code?
And other question: I have to multiply the stock from CSV with a number stored in the UPC field of the product (the CSV contains pieces while in the webshop we sell packages and I store the pcs/package number in the UPC field). How do I modify the code the achieve this?