fix: Allow zero valuation in stock reconciliation

Stock reconciliation can not be done for customer provided item as they
have zero valuation. This change adds a checkbox in item table to allow
such items.

Related issue: ISS-20-21-10248

erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.py

@@ -31,6 +31,7 @@ class StockReconciliation(StockController):
 		self.validate_expense_account()
 		self.set_total_qty_and_amount()
 		self.validate_putaway_capacity()
+		self.validate_customer_provided_item()
 
 		if self._action=="submit":
 			self.make_batches('warehouse')
@@ -217,7 +218,7 @@ class StockReconciliation(StockController):
 					if row.valuation_rate in ("", None):
 						row.valuation_rate = previous_sle.get("valuation_rate", 0)
 
-				if row.qty and not row.valuation_rate:
+				if row.qty and not row.valuation_rate and not row.allow_zero_valuation_rate:
 					frappe.throw(_("Valuation Rate required for Item {0} at row {1}").format(row.item_code, row.idx))
 
 				if ((previous_sle and row.qty == previous_sle.get("qty_after_transaction")
@@ -531,4 +532,4 @@ def get_difference_account(purpose, company):
 		account = frappe.db.get_value('Account', {'is_group': 0,
 			'company': company, 'account_type': 'Temporary'}, 'name')
 
-	return account
+	return account

erpnext/stock/doctype/stock_reconciliation_item/stock_reconciliation_item.json

@@ -13,6 +13,7 @@
   "qty",
   "valuation_rate",
   "amount",
+  "allow_zero_valuation_rate",
   "serial_no_and_batch_section",
   "serial_no",
   "column_break_11",
@@ -166,10 +167,19 @@
    "fieldtype": "Link",
    "label": "Batch No",
    "options": "Batch"
+  },
+  {
+   "default": "0",
+   "fieldname": "allow_zero_valuation_rate",
+   "fieldtype": "Check",
+   "label": "Allow Zero Valuation Rate",
+   "print_hide": 1,
+   "read_only": 1
   }
  ],
  "istable": 1,
- "modified": "2019-06-14 17:10:53.188305",
+ "links": [],
+ "modified": "2021-03-23 11:09:44.407157",
  "modified_by": "Administrator",
  "module": "Stock",
  "name": "Stock Reconciliation Item",
@@ -179,4 +189,4 @@
  "sort_field": "modified",
  "sort_order": "DESC",
  "track_changes": 1
-}
+}