fix: consider min order qty in the purchase/transfer flow of production plan (backport #57204) (#57209)

* fix: consider min order qty in the purchase/transfer flow of production plan (backport #57204)

The transfer flow ignored Consider Minimum Order Qty twice: the JS
handler force-reset the checkbox before fetching items, and the
purchase remainder left after allocating transfers from other
warehouses was never raised to min_order_qty (the check runs on the
total requirement before the split).

Drop the JS reset and apply min order qty to the purchase remainder,
in stock UOM before the purchase UOM conversion.

* test: do not set ignore_existing_ordered_qty; v15 gates the transfer split on it being unset

erpnext/manufacturing/doctype/production_plan/production_plan.js

@@ -365,8 +365,6 @@ frappe.ui.form.on("Production Plan", {
 			frappe.throw(__("Select the Warehouse"));
 		}
 
-		frm.set_value("consider_minimum_order_qty", 0);
-
 		if (frm.doc.ignore_existing_ordered_qty) {
 			frm.events.get_items_for_material_requests(frm);
 		} else {

erpnext/manufacturing/doctype/production_plan/production_plan.py

@@ -1708,7 +1708,13 @@ def get_items_for_material_requests(doc, warehouses=None, get_parent_warehouse_d
 	if (not ignore_existing_ordered_qty or get_parent_warehouse_data) and warehouses:
 		new_mr_items = []
 		for item in mr_items:
-			get_materials_from_other_locations(item, warehouses, new_mr_items, company)
+			get_materials_from_other_locations(
+				item,
+				warehouses,
+				new_mr_items,
+				company,
+				consider_minimum_order_qty=doc.get("consider_minimum_order_qty"),
+			)
 
 		mr_items = new_mr_items
 
@@ -1728,7 +1734,9 @@ def get_items_for_material_requests(doc, warehouses=None, get_parent_warehouse_d
 	return mr_items
 
 
-def get_materials_from_other_locations(item, warehouses, new_mr_items, company):
+def get_materials_from_other_locations(
+	item, warehouses, new_mr_items, company, consider_minimum_order_qty=False
+):
 	from erpnext.stock.doctype.pick_list.pick_list import get_available_item_locations
 
 	stock_uom, purchase_uom = frappe.db.get_value(
@@ -1773,7 +1781,8 @@ def get_materials_from_other_locations(item, warehouses, new_mr_items, company):
 
 	precision = frappe.get_precision("Material Request Plan Item", "quantity")
 	if flt(required_qty, precision) > 0:
-		required_qty = required_qty
+		if consider_minimum_order_qty:
+			required_qty = max(required_qty, flt(item.get("min_order_qty")))
 
 		if frappe.db.get_value("UOM", purchase_uom, "must_be_whole_number"):
 			required_qty = ceil(required_qty)

erpnext/manufacturing/doctype/production_plan/test_production_plan.py

@@ -1832,6 +1832,17 @@ class TestProductionPlan(FrappeTestCase):
 		for d in mr_items:
 			self.assertEqual(d.get("quantity"), 1000.0)
 
+		source_warehouse = create_warehouse("MOQ Source Warehouse", company="_Test Company")
+		make_stock_entry(item_code=rm_item, qty=7, rate=100, target=source_warehouse)
+
+		mr_items = get_items_for_material_requests(
+			pln.as_dict(), warehouses=[{"warehouse": source_warehouse}]
+		)
+		self.assertEqual(len(mr_items), 2)
+		items_by_type = {d.get("material_request_type"): d for d in mr_items}
+		self.assertEqual(items_by_type["Material Transfer"].get("quantity"), 7.0)
+		self.assertEqual(items_by_type["Purchase"].get("quantity"), 1000.0)
+
 	def test_fg_item_quantity(self):
 		fg_item = make_item(properties={"is_stock_item": 1}).name
 		rm_item = make_item(properties={"is_stock_item": 1}).name