Getting item rate from different price list in sales invoice item table

Frappe Framework Custom Script
1

I’m trying to implement letting the user choose different price lists to get rate from for each item in a Sales Invoice. I’ve added a field to the items table and am having some trouble with the custom script, this is what I have so far but its not changing the rate value:

This is the custom field I added in the Sales Invoice Item doctype:

28%20AM
28%20AM2426×86 10 KB

This is the client script:

27%20AM
27%20AM2012×1026 179 KB

2

You may have more than 1 price for the item. Can you

console.log(r);

to see what is the result?