feat: allow fallback to default selling price list (backport #49634) (#49704)

Co-authored-by: barredterra <14891507+barredterra@users.noreply.github.com>
Co-authored-by: Henning Wendtland <156231187+HenningWendtland@users.noreply.github.com>

erpnext/selling/doctype/selling_settings/selling_settings.json

@@ -17,6 +17,7 @@
   "role_to_override_stop_action",
   "column_break_15",
   "maintain_same_sales_rate",
+  "fallback_to_default_price_list",
   "editable_price_list_rate",
   "validate_selling_price",
   "editable_bundle_item_rates",
@@ -216,6 +217,12 @@
    "fieldname": "allow_zero_qty_in_quotation",
    "fieldtype": "Check",
    "label": "Allow Quotation with Zero Quantity"
+  },
+  {
+   "default": "0",
+   "fieldname": "fallback_to_default_price_list",
+   "fieldtype": "Check",
+   "label": "Use Prices from Default Price List as Fallback"
   }
  ],
  "grid_page_length": 50,
@@ -224,7 +231,7 @@
  "index_web_pages_for_search": 1,
  "issingle": 1,
  "links": [],
- "modified": "2025-05-06 15:23:14.332971",
+ "modified": "2025-09-23 21:10:14.826653",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Selling Settings",

erpnext/selling/doctype/selling_settings/selling_settings.py

@@ -5,6 +5,7 @@
 
 
 import frappe
+from frappe import _
 from frappe.custom.doctype.property_setter.property_setter import make_property_setter
 from frappe.model.document import Document
 from frappe.utils import cint
@@ -33,6 +34,7 @@ class SellingSettings(Document):
 		editable_bundle_item_rates: DF.Check
 		editable_price_list_rate: DF.Check
 		enable_discount_accounting: DF.Check
+		fallback_to_default_price_list: DF.Check
 		hide_tax_id: DF.Check
 		maintain_same_rate_action: DF.Literal["Stop", "Warn"]
 		maintain_same_sales_rate: DF.Check
@@ -69,6 +71,25 @@ class SellingSettings(Document):
 			hide_name_field=False,
 		)
 
+		self.validate_fallback_to_default_price_list()
+
+	def validate_fallback_to_default_price_list(self):
+		if (
+			self.fallback_to_default_price_list
+			and self.has_value_changed("fallback_to_default_price_list")
+			and frappe.get_single_value("Stock Settings", "auto_insert_price_list_rate_if_missing")
+		):
+			stock_meta = frappe.get_meta("Stock Settings")
+			frappe.msgprint(
+				_(
+					"You have enabled {0} and {1} in {2}. This can lead to prices from the default price list being inserted into the transaction price list."
+				).format(
+					"<i>{}</i>".format(_(self.meta.get_label("fallback_to_default_price_list"))),
+					"<i>{}</i>".format(_(stock_meta.get_label("auto_insert_price_list_rate_if_missing"))),
+					frappe.bold(_("Stock Settings")),
+				)
+			)
+
 	def toggle_hide_tax_id(self):
 		self.hide_tax_id = cint(self.hide_tax_id)
 

erpnext/stock/doctype/stock_settings/stock_settings.py

@@ -105,6 +105,7 @@ class StockSettings(Document):
 		self.validate_clean_description_html()
 		self.validate_pending_reposts()
 		self.validate_stock_reservation()
+		self.validate_auto_insert_price_list_rate_if_missing()
 		self.change_precision_for_for_sales()
 		self.change_precision_for_purchase()
 
@@ -219,6 +220,23 @@ class StockSettings(Document):
 						)
 					)
 
+	def validate_auto_insert_price_list_rate_if_missing(self):
+		if (
+			self.auto_insert_price_list_rate_if_missing
+			and self.has_value_changed("auto_insert_price_list_rate_if_missing")
+			and frappe.get_single_value("Selling Settings", "fallback_to_default_price_list")
+		):
+			selling_meta = frappe.get_meta("Selling Settings")
+			frappe.msgprint(
+				_(
+					"You have enabled {0} and {1} in {2}. This can lead to prices from the default price list being inserted in the transaction price list."
+				).format(
+					"<i>{}</i>".format(_(self.meta.get_label("auto_insert_price_list_rate_if_missing"))),
+					"<i>{}</i>".format(_(selling_meta.get_label("fallback_to_default_price_list"))),
+					frappe.bold(_("Selling Settings")),
+				)
+			)
+
 	def on_update(self):
 		self.toggle_warehouse_field_for_inter_warehouse_transfer()
 

erpnext/stock/get_item_details.py

@@ -98,6 +98,15 @@ def get_item_details(args, doc=None, for_validate=False, overwrite_warehouse=Tru
 
 	out.update(get_price_list_rate(args, item))
 
+	if (
+		not out.price_list_rate
+		and args.transaction_type == "selling"
+		and frappe.get_single_value("Selling Settings", "fallback_to_default_price_list")
+	):
+		fallback_args = args.copy()
+		fallback_args.price_list = frappe.get_single_value("Selling Settings", "selling_price_list")
+		out.update(get_price_list_rate(fallback_args, item))
+
 	args.customer = current_customer
 
 	if args.customer and cint(args.is_pos):