brotherton-erpnext/erpnext/regional/united_arab_emirates/utils.py

from __future__ import unicode_literals
import frappe
from frappe.utils import flt
from erpnext.controllers.taxes_and_totals import get_itemised_tax
from six import iteritems

def update_itemised_tax_data(doc):
	if not doc.taxes: return

	itemised_tax = get_itemised_tax(doc.taxes)

	for row in doc.items:
		tax_rate = 0.0
		item_tax_rate = frappe.parse_json(row.item_tax_rate)

		# First check if tax rate is present
		# If not then look up in item_wise_tax_detail
		if item_tax_rate:
			for account, rate in iteritems(item_tax_rate):
				tax_rate += rate
		elif itemised_tax.get(row.item_code):
			tax_rate = sum([tax.get('tax_rate', 0) for d, tax in itemised_tax.get(row.item_code).items()])

		row.tax_rate = flt(tax_rate, row.precision("tax_rate"))
		row.tax_amount = flt((row.net_amount * tax_rate) / 100, row.precision("net_amount"))
		row.total_amount = flt((row.net_amount + row.tax_amount), row.precision("total_amount"))