[Python] How can override a class method in controller ERPNext 14

I have been trying to override the method (calculate_item_values) in the controller (taxes_and_totals.py) by my own custom formula but it doesn't seem to work but when I tried for a doctype class method (Quotation) it did override should i try something else ? I hope you can provide me some help

this my custom_file in my custom app(override.py)

import frappe
from frappe import _, scrub
from frappe.utils import flt
from erpnext.controllers.taxes_and_totals import calculate_taxes_and_totals
from erpnext.accounts.doctype.pricing_rule.utils import get_applied_pricing_rules

class Calculating_amount(calculate_taxes_and_totals):
def calculate_item_values(self):
print('khello')
if self.doc.get("is_consolidated"):
return

if not self.discount_amount_applied:
for item in self._items:
self.doc.round_floats_in(item)

if item.discount_percentage == 100:
item.rate = 0.0
elif item.price_list_rate:
if not item.rate or (
item.pricing_rules and item.discount_percentage > 0
):
item.rate = flt(
item.price_list_rate
* (1.0 - (item.discount_percentage / 100.0)),
item.precision("rate"),
)

item.discount_amount = item.price_list_rate * (
item.discount_percentage / 100.0
)

elif item.discount_amount and item.pricing_rules:
item.rate = item.price_list_rate - item.discount_amount

if item.doctype in [
"Quotation Item",
"Sales Order Item",
"Delivery Note Item",
"Sales Invoice Item",
"POS Invoice Item",
"Purchase Invoice Item",
"Purchase Order Item",
"Purchase Receipt Item",
]:
(
item.rate_with_margin,
item.base_rate_with_margin,
) = self.calculate_margin(item)
if flt(item.rate_with_margin) > 0:
item.rate = flt(
item.rate_with_margin
* (1.0 - (item.discount_percentage / 100.0)),
item.precision("rate"),
)

if item.discount_amount and not item.discount_percentage:
item.rate = item.rate_with_margin - item.discount_amount
else:
item.discount_amount = item.rate_with_margin - item.rate

elif flt(item.price_list_rate) > 0:
item.discount_amount = item.price_list_rate - item.rate
elif flt(item.price_list_rate) > 0 and not item.discount_amount:
item.discount_amount = item.price_list_rate - item.rate

item.net_rate = item.rate

if not item.qty and self.doc.get("is_return"):
item.amount = flt(-1 * item.rate, item.precision("amount"))
elif not item.qty and self.doc.get("is_debit_note"):
item.amount = flt(item.rate, item.precision("amount"))
else:
item.amount = flt(
item.rate * item.qty * item.length * item.width,
item.precision("amount"),
)

item.net_amount = item.amount

self._set_in_company_currency(
item,
["price_list_rate", "rate", "net_rate", "amount", "net_amount"],
)

item.item_tax_amount = 0.0

def _set_in_company_currency(self, doc, fields):
# set values in base currency
for f in fields:
val = flt(
flt(
doc.get(f),
doc.precision(f) * self.doc.conversion_rate,
doc.precision("base_" + f),
)
)
doc.set("base_" + f, val)

def calculate_margin(self, item):
rate_with_margin = 0.0
base_rate_with_margin = 0.0
if item.price_list_rate:
if item.pricing_rules and not self.doc.ignore_pricing_rule:
has_margin = False
for d in get_applied_pricing_rules(item.pricing_rules):
pricing_rule = frappe.get_cached_doc("Pricing Rule", d)
if pricing_rule.margin_rate_or_amount and (
(
pricing_rule.currency == self.doc.currency
and pricing_rule.margin_type in ["Amount", "Percentage"]
)
or pricing_rule.margin_type == "Percentage"
):
item.margin_type = pricing_rule.margin_type
item.margin_rate_or_amount = pricing_rule.margin_rate_or_amount
has_margin = True
if not has_margin:
item.margin_type = None
item.margin_rate_or_amount = 0.0
if not item.pricing_rules and flt(item.rate) > flt(item.price_list_rate):
item.margin_type = "Amount"
item.margin_rate_or_amount = flt(
item.rate - item.price_list_rate,
item.precision("margin_rate_or_amount"),
)
item.rate_with_margin = item.rate
elif item.margin_type and item.margin_rate_or_amount:
margin_value = (
item.margin_rate_or_amount
if item.margin_type == "Amount"
else flt(item.price_list_rate)
* flt(item.margin_rate_or_amount)
/ 100
)
rate_with_margin = flt(item.price_list_rate) + flt(margin_value)
base_rate_with_margin = flt(rate_with_margin) * flt(
self.doc.conversion_rate
)

return rate_with_margin, base_rate_with_margin



and this is my hook file

override_doctype_class = {
"calculate_taxes_and_totals":"test_app.override.Calculating_amount"
}

Continue reading...