Suppose you have a shopping site that sells widgets. However, the inventory of each widget is limited, so it's important to keep the "widget.number_still_available" number up to date.Suppose you have a shopping site that sells wid
Suppose you have a shopping site that sells widgets. However, the inventory of each widget is limited, so it's important to keep the "widget.number_still_available" number up to date.Suppose you have a shopping site that sells wid