fix: Make corrected bankers rounding default method

frappe/core/doctype/system_settings/system_settings.js

@@ -16,6 +16,8 @@ frappe.ui.form.on("System Settings", {
 				}
 			},
 		});
+
+		frm.trigger("set_rounding_method_options");
 	},
 	enable_password_policy: function (frm) {
 		if (frm.doc.enable_password_policy == 0) {
@@ -56,4 +58,17 @@ frappe.ui.form.on("System Settings", {
 			}
 		);
 	},
+
+	set_rounding_method_options: function (frm) {
+		if (frm.doc.rounding_method != "Banker's Rounding (legacy)") {
+			let field = frm.fields_dict.rounding_method;
+
+			field.df.options = field.df.options
+				.split("\n")
+				.filter((o) => o != "Banker's Rounding (legacy)")
+				.join("\n");
+
+			field.refresh();
+		}
+	},
 });

frappe/desk/page/setup_wizard/setup_wizard.py

@@ -165,6 +165,7 @@ def update_system_settings(args):
 			"language": get_language_code(args.get("language")) or "en",
 			"time_zone": args.get("timezone"),
 			"float_precision": 3,
+			"rounding_method": "Banker's Rounding",
 			"date_format": frappe.db.get_value("Country", args.get("country"), "date_format"),
 			"time_format": frappe.db.get_value("Country", args.get("country"), "time_format"),
 			"number_format": number_format,

frappe/tests/test_utils.py

@@ -1150,3 +1150,6 @@ class TestRounding(FrappeTestCase):
 	@given(st.decimals(min_value=-1e8, max_value=1e8), st.integers(min_value=-2, max_value=4))
 	def test_bankers_rounding_property(self, number, precision):
 		self.assertEqual(Decimal(str(flt(float(number), precision))), round(number, precision))
+
+	def test_default_rounding(self):
+		self.assertEqual(frappe.get_system_settings("rounding_method"), "Banker's Rounding")