feat: Batch wise item pricing

erpnext/public/js/controllers/transaction.js

@@ -1103,6 +1103,11 @@ erpnext.TransactionController = erpnext.taxes_and_totals.extend({
 		}
 	},
 
+	batch_no: function(doc, cdt, cdn) {
+		let item = frappe.get_doc(cdt, cdn);
+		this.apply_pricing_rule(item, true);
+	},
+
 	toggle_conversion_factor: function(item) {
 		// toggle read only property for conversion factor field if the uom and stock uom are same
 		if(this.frm.get_field('items').grid.fields_map.conversion_factor) {

erpnext/stock/doctype/item_price/item_price.py

@@ -54,7 +54,8 @@ class ItemPrice(Document):
 			"valid_upto",
 			"packing_unit",
 			"customer",
-			"supplier",]:
+			"supplier",
+			"batch_no"]:
 			if self.get(field):
 				conditions += " and {0} = %({0})s ".format(field)
 			else:
@@ -68,7 +69,7 @@ class ItemPrice(Document):
 			self.as_dict(),)
 
 		if price_list_rate:
-			frappe.throw(_("Item Price appears multiple times based on Price List, Supplier/Customer, Currency, Item, UOM, Qty, and Dates."), ItemPriceDuplicateItem,)
+			frappe.throw(_("Item Price appears multiple times based on Price List, Supplier/Customer, Currency, Item, Batch, UOM, Qty, and Dates."), ItemPriceDuplicateItem,)
 
 	def before_save(self):
 		if self.selling:

erpnext/stock/get_item_details.py

@@ -680,6 +680,9 @@ def get_item_price(args, item_code, ignore_party=False):
 		else:
 			conditions += "and (customer is null or customer = '') and (supplier is null or supplier = '')"
 
+	if args.get('batch_no'):
+		conditions += "and batch_no = %(batch_no)s"
+
 	if args.get('transaction_date'):
 		conditions += """ and %(transaction_date)s between
 			ifnull(valid_from, '2000-01-01') and ifnull(valid_upto, '2500-12-31')"""
@@ -709,6 +712,7 @@ def get_price_list_rate_for(args, item_code):
 			"uom": args.get('uom'),
 			"transaction_date": args.get('transaction_date'),
 			"posting_date": args.get('posting_date'),
+			"batch_no": args.get('batch_no')
 	}
 
 	item_price_data = 0