fix(pos): error while consolidating pos invoices

(cherry picked from commit 33762db)

erpnext/accounts/doctype/pos_profile/pos_profile.json

@@ -43,6 +43,7 @@
   "currency",
   "write_off_account",
   "write_off_cost_center",
+  "write_off_limit",
   "account_for_change_amount",
   "disable_rounded_total",
   "column_break_23",
@@ -360,6 +361,14 @@
    "fieldtype": "Check",
    "label": "Validate Stock on Save"
   },
+  {
+   "default": "1",
+   "description": "Auto write off precision loss while consolidation",
+   "fieldname": "write_off_limit",
+   "fieldtype": "Currency",
+   "label": "Write Off Limit",
+   "reqd": 1
+  },
   {
    "default": "0",
    "description": "If enabled, the consolidated invoices will have rounded total disabled",
@@ -393,7 +402,7 @@
    "link_fieldname": "pos_profile"
   }
  ],
- "modified": "2022-07-21 11:16:46.911173",
+ "modified": "2022-08-10 12:57:06.241439",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "POS Profile",

erpnext/controllers/taxes_and_totals.py

@@ -770,6 +770,18 @@ def calculate_outstanding_amount(self):
 				self.doc.precision("outstanding_amount"),
 			)
 
+			if (
+				self.doc.doctype == "Sales Invoice"
+				and self.doc.get("is_pos")
+				and self.doc.get("pos_profile")
+				and self.doc.get("is_consolidated")
+			):
+				write_off_limit = flt(
+					frappe.db.get_value("POS Profile", self.doc.pos_profile, "write_off_limit")
+				)
+				if write_off_limit and abs(self.doc.outstanding_amount) <= write_off_limit:
+					self.doc.write_off_outstanding_amount_automatically = 1
+
 			if (
 				self.doc.doctype == "Sales Invoice"
 				and self.doc.get("is_pos")