Merge pull request frappe#34357 from frappe/mergify/bp/version-13-hot…

…fix/pr-34352

fix: `BOM Stock Report` (backport frappe#34352)

erpnext/manufacturing/report/bom_stock_report/bom_stock_report.py

@@ -4,7 +4,8 @@
 
 import frappe
 from frappe import _
-from frappe.query_builder.functions import Sum
+from frappe.query_builder.functions import Floor, Sum
+from frappe.utils import cint
 from pypika.terms import ExistsCriterion
 
 
@@ -34,57 +35,55 @@ def get_columns():
 
 
 def get_bom_stock(filters):
-	qty_to_produce = filters.get("qty_to_produce") or 1
-	if int(qty_to_produce) < 0:
-		frappe.throw(_("Quantity to Produce can not be less than Zero"))
+	qty_to_produce = filters.get("qty_to_produce")
+	if cint(qty_to_produce) <= 0:
+		frappe.throw(_("Quantity to Produce should be greater than zero."))
 
 	if filters.get("show_exploded_view"):
 		bom_item_table = "BOM Explosion Item"
 	else:
 		bom_item_table = "BOM Item"
 
-	bin = frappe.qb.DocType("Bin")
-	bom = frappe.qb.DocType("BOM")
-	bom_item = frappe.qb.DocType(bom_item_table)
+	warehouse_details = frappe.db.get_value(
+		"Warehouse", filters.get("warehouse"), ["lft", "rgt"], as_dict=1
+	)
 
-	query = (
-		frappe.qb.from_(bom)
-		.inner_join(bom_item)
-		.on(bom.name == bom_item.parent)
-		.left_join(bin)
-		.on(bom_item.item_code == bin.item_code)
+	BOM = frappe.qb.DocType("BOM")
+	BOM_ITEM = frappe.qb.DocType(bom_item_table)
+	BIN = frappe.qb.DocType("Bin")
+	WH = frappe.qb.DocType("Warehouse")
+	CONDITIONS = ()
+
+	if warehouse_details:
+		CONDITIONS = ExistsCriterion(
+			frappe.qb.from_(WH)
+			.select(WH.name)
+			.where(
+				(WH.lft >= warehouse_details.lft)
+				& (WH.rgt <= warehouse_details.rgt)
+				& (BIN.warehouse == WH.name)
+			)
+		)
+	else:
+		CONDITIONS = BIN.warehouse == filters.get("warehouse")
+
+	QUERY = (
+		frappe.qb.from_(BOM)
+		.inner_join(BOM_ITEM)
+		.on(BOM.name == BOM_ITEM.parent)
+		.left_join(BIN)
+		.on((BOM_ITEM.item_code == BIN.item_code) & (CONDITIONS))
 		.select(
-			bom_item.item_code,
-			bom_item.description,
-			bom_item.stock_qty,
-			bom_item.stock_uom,
-			(bom_item.stock_qty / bom.quantity) * qty_to_produce,
-			Sum(bin.actual_qty),
-			Sum(bin.actual_qty) / (bom_item.stock_qty / bom.quantity),
+			BOM_ITEM.item_code,
+			BOM_ITEM.description,
+			BOM_ITEM.stock_qty,
+			BOM_ITEM.stock_uom,
+			BOM_ITEM.stock_qty * qty_to_produce / BOM.quantity,
+			Sum(BIN.actual_qty).as_("actual_qty"),
+			Sum(Floor(BIN.actual_qty / (BOM_ITEM.stock_qty * qty_to_produce / BOM.quantity))),
 		)
-		.where((bom_item.parent == filters.get("bom")) & (bom_item.parenttype == "BOM"))
-		.groupby(bom_item.item_code)
+		.where((BOM_ITEM.parent == filters.get("bom")) & (BOM_ITEM.parenttype == "BOM"))
+		.groupby(BOM_ITEM.item_code)
 	)
 
-	if filters.get("warehouse"):
-		warehouse_details = frappe.db.get_value(
-			"Warehouse", filters.get("warehouse"), ["lft", "rgt"], as_dict=1
-		)
-
-		if warehouse_details:
-			wh = frappe.qb.DocType("Warehouse")
-			query = query.where(
-				ExistsCriterion(
-					frappe.qb.from_(wh)
-					.select(wh.name)
-					.where(
-						(wh.lft >= warehouse_details.lft)
-						& (wh.rgt <= warehouse_details.rgt)
-						& (bin.warehouse == wh.name)
-					)
-				)
-			)
-		else:
-			query = query.where(bin.warehouse == filters.get("warehouse"))
-
-	return query.run()
+	return QUERY.run()

erpnext/manufacturing/report/bom_stock_report/test_bom_stock_report.py

@@ -0,0 +1,110 @@
+# Copyright (c) 2022, Frappe Technologies Pvt. Ltd. and contributors
+# For license information, please see license.txt
+
+
+import frappe
+from frappe.exceptions import ValidationError
+from frappe.tests.utils import FrappeTestCase
+from frappe.utils import floor
+
+from erpnext.manufacturing.doctype.production_plan.test_production_plan import make_bom
+from erpnext.manufacturing.report.bom_stock_report.bom_stock_report import (
+	get_bom_stock as bom_stock_report,
+)
+from erpnext.stock.doctype.item.test_item import make_item
+from erpnext.stock.doctype.stock_entry.test_stock_entry import make_stock_entry
+
+
+class TestBomStockReport(FrappeTestCase):
+	def setUp(self):
+		self.warehouse = "_Test Warehouse - _TC"
+		self.fg_item, self.rm_items = create_items()
+		make_stock_entry(target=self.warehouse, item_code=self.rm_items[0], qty=20, basic_rate=100)
+		make_stock_entry(target=self.warehouse, item_code=self.rm_items[1], qty=40, basic_rate=200)
+		self.bom = make_bom(item=self.fg_item, quantity=1, raw_materials=self.rm_items, rm_qty=10)
+
+	def test_bom_stock_report(self):
+		# Test 1: When `qty_to_produce` is 0.
+		filters = frappe._dict(
+			{
+				"bom": self.bom.name,
+				"warehouse": "Stores - _TC",
+				"qty_to_produce": 0,
+			}
+		)
+		self.assertRaises(ValidationError, bom_stock_report, filters)
+
+		# Test 2: When stock is not available.
+		data = bom_stock_report(
+			frappe._dict(
+				{
+					"bom": self.bom.name,
+					"warehouse": "Stores - _TC",
+					"qty_to_produce": 1,
+				}
+			)
+		)
+		expected_data = get_expected_data(self.bom, "Stores - _TC", 1)
+		self.assertSetEqual(set(tuple(x) for x in data), set(tuple(x) for x in expected_data))
+
+		# Test 3: When stock is available.
+		data = bom_stock_report(
+			frappe._dict(
+				{
+					"bom": self.bom.name,
+					"warehouse": self.warehouse,
+					"qty_to_produce": 1,
+				}
+			)
+		)
+		expected_data = get_expected_data(self.bom, self.warehouse, 1)
+		self.assertSetEqual(set(tuple(x) for x in data), set(tuple(x) for x in expected_data))
+
+
+def create_items():
+	fg_item = make_item(properties={"is_stock_item": 1}).name
+	rm_item1 = make_item(
+		properties={
+			"is_stock_item": 1,
+			"standard_rate": 100,
+			"opening_stock": 100,
+			"last_purchase_rate": 100,
+		}
+	).name
+	rm_item2 = make_item(
+		properties={
+			"is_stock_item": 1,
+			"standard_rate": 200,
+			"opening_stock": 200,
+			"last_purchase_rate": 200,
+		}
+	).name
+
+	return fg_item, [rm_item1, rm_item2]
+
+
+def get_expected_data(bom, warehouse, qty_to_produce, show_exploded_view=False):
+	expected_data = []
+
+	for item in bom.get("exploded_items") if show_exploded_view else bom.get("items"):
+		in_stock_qty = None
+		if frappe.db.exists("Bin", {"item_code": item.item_code, "warehouse": warehouse}, "actual_qty"):
+			in_stock_qty = frappe.get_cached_value(
+				"Bin", {"item_code": item.item_code, "warehouse": warehouse}, "actual_qty"
+			)
+
+		expected_data.append(
+			[
+				item.item_code,
+				item.description,
+				item.stock_qty,
+				item.stock_uom,
+				item.stock_qty * qty_to_produce / bom.quantity,
+				in_stock_qty,
+				floor(in_stock_qty / (item.stock_qty * qty_to_produce / bom.quantity))
+				if in_stock_qty
+				else None,
+			]
+		)
+
+	return expected_data