refactor!: dynamically compute bom_level (backport #29522)

erpnext/manufacturing/doctype/bom/bom.json

@@ -37,7 +37,6 @@
   "inspection_required",
   "quality_inspection_template",
   "column_break_31",
-  "bom_level",
   "section_break_33",
   "items",
   "scrap_section",
@@ -522,13 +521,6 @@
    "fieldname": "column_break_31",
    "fieldtype": "Column Break"
   },
-  {
-   "default": "0",
-   "fieldname": "bom_level",
-   "fieldtype": "Int",
-   "label": "BOM Level",
-   "read_only": 1
-  },
   {
    "fieldname": "section_break_33",
    "fieldtype": "Section Break",
@@ -540,7 +532,7 @@
  "image_field": "image",
  "is_submittable": 1,
  "links": [],
- "modified": "2021-11-18 13:04:16.271975",
+ "modified": "2022-01-30 21:27:54.727298",
  "modified_by": "Administrator",
  "module": "Manufacturing",
  "name": "BOM",
@@ -577,5 +569,6 @@
  "show_name_in_global_search": 1,
  "sort_field": "modified",
  "sort_order": "DESC",
+ "states": [],
  "track_changes": 1
 }

erpnext/manufacturing/doctype/bom/bom.py

@@ -156,8 +156,6 @@ def validate(self):
 		self.update_stock_qty()
 		self.validate_scrap_items()
 		self.update_cost(update_parent=False, from_child_bom=True, update_hour_rate = False, save=False)
-		self.set_bom_level()
-
 
 	def get_context(self, context):
 		context.parents = [{'name': 'boms', 'title': _('All BOMs') }]
@@ -704,7 +702,6 @@ def validate_operations(self):
 				if not d.batch_size or d.batch_size <= 0:
 					d.batch_size = 1
 
-
 	def validate_scrap_items(self):
 		for item in self.scrap_items:
 			msg = ""
@@ -735,20 +732,6 @@ def get_tree_representation(self) -> BOMTree:
 		"""Get a complete tree representation preserving order of child items."""
 		return BOMTree(self.name)
 
-	def set_bom_level(self, update=False):
-		levels = []
-
-		self.bom_level = 0
-		for row in self.items:
-			if row.bom_no:
-				levels.append(frappe.get_cached_value("BOM", row.bom_no, "bom_level") or 0)
-
-		if levels:
-			self.bom_level = max(levels) + 1
-
-		if update:
-			self.db_set("bom_level", self.bom_level)
-
 def get_bom_item_rate(args, bom_doc):
 	if bom_doc.rm_cost_as_per == 'Valuation Rate':
 		rate = get_valuation_rate(args) * (args.get("conversion_factor") or 1)

erpnext/manufacturing/doctype/production_plan/production_plan.py

@@ -560,9 +560,11 @@ def get_sub_assembly_items(self, manufacturing_type=None):
 			get_sub_assembly_items(row.bom_no, bom_data, row.planned_qty)
 			self.set_sub_assembly_items_based_on_level(row, bom_data, manufacturing_type)
 
-	def set_sub_assembly_items_based_on_level(self, row, bom_data, manufacturing_type=None):
-		bom_data = sorted(bom_data, key = lambda i: i.bom_level)
+		self.sub_assembly_items.sort(key= lambda d: d.bom_level, reverse=True)
+		for idx, row in enumerate(self.sub_assembly_items, start=1):
+			row.idx = idx
 
+	def set_sub_assembly_items_based_on_level(self, row, bom_data, manufacturing_type=None):
 		for data in bom_data:
 			data.qty = data.stock_qty
 			data.production_plan_item = row.name
@@ -1005,9 +1007,6 @@ def get_sub_assembly_items(bom_no, bom_data, to_produce_qty, indent=0):
 	for d in data:
 		if d.expandable:
 			parent_item_code = frappe.get_cached_value("BOM", bom_no, "item")
-			bom_level = (frappe.get_cached_value("BOM", d.value, "bom_level")
-				if d.value else 0)
-
 			stock_qty = (d.stock_qty / d.parent_bom_qty) * flt(to_produce_qty)
 			bom_data.append(frappe._dict({
 				'parent_item_code': parent_item_code,
@@ -1018,7 +1017,7 @@ def get_sub_assembly_items(bom_no, bom_data, to_produce_qty, indent=0):
 				'uom': d.stock_uom,
 				'bom_no': d.value,
 				'is_sub_contracted_item': d.is_sub_contracted_item,
-				'bom_level': bom_level,
+				'bom_level': indent,
 				'indent': indent,
 				'stock_qty': stock_qty
 			}))

erpnext/manufacturing/doctype/production_plan/test_production_plan.py

@@ -347,6 +347,45 @@ def test_get_sales_order_with_variant(self):
 
 		frappe.db.rollback()
 
+	def test_subassmebly_sorting(self):
+		""" Test subassembly sorting in case of multiple items with nested BOMs"""
+		from erpnext.manufacturing.doctype.bom.test_bom import create_nested_bom
+
+		prefix = "_TestLevel_"
+		boms = {
+			"Assembly": {
+				"SubAssembly1": {"ChildPart1": {}, "ChildPart2": {},},
+				"SubAssembly2": {"ChildPart3": {}},
+				"SubAssembly3": {"SubSubAssy1": {"ChildPart4": {}}},
+				"ChildPart5": {},
+				"ChildPart6": {},
+				"SubAssembly4": {"SubSubAssy2": {"ChildPart7": {}}},
+			},
+			"MegaDeepAssy": {
+				"SecretSubassy": {"SecretPart": {"VerySecret" : { "SuperSecret": {"Classified": {}}}},},
+																# ^ assert that this is
+																# first item in subassy table
+			}
+		}
+		create_nested_bom(boms, prefix=prefix)
+
+		items = [prefix + item_code for item_code in boms.keys()]
+		plan = create_production_plan(item_code=items[0], do_not_save=True)
+		plan.append("po_items", {
+			'use_multi_level_bom': 1,
+			'item_code': items[1],
+			'bom_no': frappe.db.get_value('Item', items[1], 'default_bom'),
+			'planned_qty': 1,
+			'planned_start_date': now_datetime()
+		})
+		plan.get_sub_assembly_items()
+
+		bom_level_order = [d.bom_level for d in plan.sub_assembly_items]
+		self.assertEqual(bom_level_order, sorted(bom_level_order, reverse=True))
+		# lowest most level of subassembly should be first
+		self.assertIn("SuperSecret", plan.sub_assembly_items[0].production_item)
+
+
 def create_production_plan(**args):
 	args = frappe._dict(args)
 

erpnext/manufacturing/doctype/production_plan_sub_assembly_item/production_plan_sub_assembly_item.json

@@ -102,7 +102,6 @@
   },
   {
    "columns": 1,
-   "fetch_from": "bom_no.bom_level",
    "fieldname": "bom_level",
    "fieldtype": "Int",
    "in_list_view": 1,
@@ -189,7 +188,7 @@
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-06-28 20:10:56.296410",
+ "modified": "2022-01-30 21:31:10.527559",
  "modified_by": "Administrator",
  "module": "Manufacturing",
  "name": "Production Plan Sub Assembly Item",
@@ -198,5 +197,6 @@
  "quick_entry": 1,
  "sort_field": "modified",
  "sort_order": "DESC",
+ "states": [],
  "track_changes": 1
 }

erpnext/manufacturing/report/bom_explorer/bom_explorer.py

@@ -26,8 +26,7 @@ def get_exploded_items(bom, data, indent=0, qty=1):
 			'item_code': item.item_code,
 			'item_name': item.item_name,
 			'indent': indent,
-			'bom_level': (frappe.get_cached_value("BOM", item.bom_no, "bom_level")
-				if item.bom_no else ""),
+			'bom_level': indent,
 			'bom': item.bom_no,
 			'qty': item.qty * qty,
 			'uom': item.uom,
@@ -73,7 +72,7 @@ def get_columns():
 		},
 		{
 			"label": "BOM Level",
-			"fieldtype": "Data",
+			"fieldtype": "Int",
 			"fieldname": "bom_level",
 			"width": 100
 		},

erpnext/manufacturing/report/production_plan_summary/production_plan_summary.py

@@ -48,7 +48,7 @@ def get_production_plan_item_details(filters, data, order_details):
 			"qty": row.planned_qty,
 			"document_type": "Work Order",
 			"document_name": work_order or "",
-			"bom_level": frappe.get_cached_value("BOM", row.bom_no, "bom_level"),
+			"bom_level": 0,
 			"produced_qty": order_details.get((work_order, row.item_code), {}).get("produced_qty", 0),
 			"pending_qty": flt(row.planned_qty) - flt(order_details.get((work_order, row.item_code), {}).get("produced_qty", 0))
 		})

erpnext/patches.txt

@@ -292,7 +292,6 @@ erpnext.patches.v13_0.set_training_event_attendance
 erpnext.patches.v13_0.rename_issue_status_hold_to_on_hold
 erpnext.patches.v13_0.bill_for_rejected_quantity_in_purchase_invoice
 erpnext.patches.v13_0.update_job_card_details
-erpnext.patches.v13_0.update_level_in_bom #1234sswef
 erpnext.patches.v13_0.create_gst_payment_entry_fields #27-11-2021
 erpnext.patches.v13_0.add_missing_fg_item_for_stock_entry
 erpnext.patches.v13_0.update_subscription_status_in_memberships