How To Make Custom Field Link to other fields in Sales and Purchase Items

[OmarJaber]

You can use add_fetch for this
please check this post

Custom script - fetch data

@max_morais_dmm add_fetch does work for child tables! Try item_code instead of item cur_frm.add_fetch('item_code','nombre_de_venta','nombre_de_venta')

Add_fetch using frappe.ui.form.on instead of cur_frm

Here is a good example of how you’re supposed to do it now: