fix: add drop ship logic in gross profit report (backport #54220) (#54277)

Co-authored-by: Mihir Kandoi <kandoimihir@gmail.com>
fix: add drop ship logic in gross profit report (#54220)

erpnext/accounts/report/gross_profit/gross_profit.py

@@ -578,7 +578,11 @@ class GrossProfitGenerator:
 
 			# get buying rate
 			if flt(row.qty):
-				row.buying_rate = flt(row.buying_amount / flt(row.qty), self.float_precision)
+				row.buying_rate = (
+					flt(row.buying_amount / flt(row.qty), self.float_precision)
+					if not row.delivered_by_supplier
+					else None
+				)
 				row.base_rate = flt(row.base_amount / flt(row.qty), self.float_precision)
 			else:
 				if self.is_not_invoice_row(row):
@@ -630,7 +634,8 @@ class GrossProfitGenerator:
 						returned_item_row.qty += row.qty
 						returned_item_row.base_amount += row.base_amount
 
-			row.buying_amount = flt(flt(row.qty) * flt(row.buying_rate), self.currency_precision)
+			if not row.delivered_by_supplier:
+				row.buying_amount = flt(flt(row.qty) * flt(row.buying_rate), self.currency_precision)
 
 	def get_average_rate_based_on_group_by(self):
 		for key in list(self.grouped):
@@ -799,6 +804,26 @@ class GrossProfitGenerator:
 				return self.calculate_buying_amount_from_sle(
 					row, my_sle, parenttype, parent, item_row, item_code
 				)
+			elif (
+				row.delivered_by_supplier
+				and row.so_detail
+				and (
+					po_details := frappe.get_all(
+						"Purchase Order Item",
+						filters={"sales_order_item": row.so_detail, "docstatus": 1},
+						pluck="name",
+					)
+				)
+			):
+				from frappe.query_builder.functions import Sum
+
+				table = frappe.qb.DocType("Purchase Invoice Item")
+				query = (
+					frappe.qb.from_(table)
+					.select(Sum(table.stock_qty * table.base_net_rate))
+					.where((table.po_detail.isin(po_details)) & (table.docstatus == 1))
+				)
+				return flt(query.run()[0][0])
 			elif row.sales_order and row.so_detail:
 				incoming_amount = self.get_buying_amount_from_so_dn(row.sales_order, row.so_detail, item_code)
 				if incoming_amount:
@@ -951,6 +976,7 @@ class GrossProfitGenerator:
 			SalesInvoice.is_return,
 			SalesInvoiceItem.cost_center,
 			SalesInvoiceItem.serial_and_batch_bundle,
+			SalesInvoiceItem.delivered_by_supplier,
 		)
 
 		if self.filters.group_by == "Sales Person":

erpnext/accounts/report/gross_profit/test_gross_profit.py

@@ -731,6 +731,31 @@ class TestGrossProfit(ERPNextTestSuite):
 		self.assertEqual(total[7], 1000.0)
 		self.assertEqual(total[8], 100.0)
 
+	def test_drop_ship(self):
+		from erpnext.buying.doctype.purchase_order.purchase_order import make_purchase_invoice
+		from erpnext.selling.doctype.sales_order.sales_order import make_purchase_order, make_sales_invoice
+		from erpnext.selling.doctype.sales_order.test_sales_order import make_sales_order
+		from erpnext.stock.doctype.item.test_item import make_item
+
+		item = make_item("_Test Drop Ship Item", properties={"is_stock_item": 1, "delivered_by_supplier": 1})
+
+		so = make_sales_order(item=item.name, qty=10, rate=100)
+		po = make_purchase_order(so.name, selected_items=[so.items[0]])[0]
+		po.items[0].rate = 80
+		po.supplier = "_Test Supplier"
+		po.submit()
+		make_purchase_invoice(po.name).submit()
+		si = make_sales_invoice(so.name).submit()
+
+		filters = frappe._dict(
+			company=si.company, from_date=si.posting_date, to_date=si.posting_date, group_by="Invoice"
+		)
+
+		_, data = execute(filters=filters)
+		self.assertEqual(data[1].buying_amount, 800)
+		self.assertIsNone(data[1].buying_rate)
+		self.assertEqual(data[1]["gross_profit_%"], 20)
+
 
 def make_sales_person(sales_person_name="_Test Sales Person"):
 	if not frappe.db.exists("Sales Person", {"sales_person_name": sales_person_name}):