Opening Balance row added to Stock Ledger Report

erpnext/stock/report/stock_ledger/stock_ledger.py

@@ -9,8 +9,13 @@ def execute(filters=None):
 	columns = get_columns()
 	sl_entries = get_stock_ledger_entries(filters)
 	item_details = get_item_details(filters)
-
+	opening_row = get_opening_balance(filters, columns)
+	
 	data = []
+	
+	if opening_row:
+		data.append(opening_row)
+
 	for sle in sl_entries:
 		item_detail = item_details[sle.item_code]
 
@@ -20,7 +25,7 @@ def execute(filters=None):
 			(sle.incoming_rate if sle.actual_qty > 0 else 0.0),
 			sle.valuation_rate, sle.stock_value, sle.voucher_type, sle.voucher_no,
 			sle.batch_no, sle.serial_no, sle.company])
-
+			
 	return columns, data
 
 def get_columns():
@@ -40,7 +45,7 @@ def get_stock_ledger_entries(filters):
 		where company = %(company)s and
 			posting_date between %(from_date)s and %(to_date)s
 			{sle_conditions}
-			order by posting_date desc, posting_time desc, name desc"""\
+			order by posting_date asc, posting_time asc, name asc"""\
 		.format(sle_conditions=get_sle_conditions(filters)), filters, as_dict=1)
 
 def get_item_details(filters):
@@ -73,3 +78,22 @@ def get_sle_conditions(filters):
 		conditions.append("voucher_no=%(voucher_no)s")
 
 	return "and {}".format(" and ".join(conditions)) if conditions else ""
+
+def get_opening_balance(filters, columns):
+	if not (filters.item_code and filters.warehouse and filters.from_date):
+		return
+
+	from erpnext.stock.stock_ledger import get_previous_sle
+	last_entry = get_previous_sle({
+		"item_code": filters.item_code,
+		"warehouse": filters.warehouse,
+		"posting_date": filters.from_date,
+		"posting_time": "00:00:00"
+	})
+	
+	row = [""]*len(columns)
+	row[1] = _("'Opening'")
+	for i, v in ((9, 'qty_after_transaction'), (11, 'valuation_rate'), (12, 'stock_value')):
+			row[i] = last_entry.get(v, 0)
+		
+	return row