I am trying to make a custom app that updates values on delivery note and delivery note item on the bases of item attributes.
I am able to update the values field following the tutorial:
Frappe - Creating a Custom Application & Integrating it with ERPNext
What I want to do is fetch item attribute vales, make calculations based on the attribute values and update the corresponding fields.
Item attributes = Height,Length and Width
Field on delivery note item: Item_volume = item.Height x Item.Length x Item.Width
Field on delivery note: total_volume= sum of all item_volume