[fix] call apply price list, apply pricing rule only if price list is mentioned or there are items in the table

erpnext/public/js/controllers/transaction.js

@@ -558,9 +558,15 @@ erpnext.TransactionController = erpnext.taxes_and_totals.extend({
 
 	apply_pricing_rule: function(item, calculate_taxes_and_totals) {
 		var me = this;
+		var args = this._get_args(item);
+		if (!(args.item_list && args.item_list.length)) {
+			if(calculate_taxes_and_totals) me.calculate_taxes_and_totals();
+			return;
+		}
+
 		return this.frm.call({
 			method: "erpnext.accounts.doctype.pricing_rule.pricing_rule.apply_pricing_rule",
-			args: {	args: this._get_args(item) },
+			args: {	args: args },
 			callback: function(r) {
 				if (!r.exc && r.message) {
 					me._set_values_for_item_list(r.message);
@@ -648,6 +654,9 @@ erpnext.TransactionController = erpnext.taxes_and_totals.extend({
 	apply_price_list: function(item) {
 		var me = this;
 		var args = this._get_args(item);
+		if (!((args.item_list && args.item_list.length) || args.price_list)) {
+			return;
+		}
 
 		return this.frm.call({
 			method: "erpnext.stock.get_item_details.apply_price_list",

erpnext/setup/utils.py

@@ -72,21 +72,20 @@ def get_exchange_rate(from_currency, to_currency):
 			key = "currency_exchange_rate:{0}:{1}".format(from_currency, to_currency)
 			value = cache.get(key)
 
-			print value
-
 			if not value:
 				import requests
 				response = requests.get("http://api.fixer.io/latest", params={
 					"base": from_currency,
 					"symbols": to_currency
 				})
-				# expire in 24 hours
+				# expire in 6 hours
 				response.raise_for_status()
 				value = response.json()["rates"][to_currency]
-				cache.setex(key, value, 24 * 60 * 60)
+				cache.setex(key, value, 6 * 60 * 60)
+
 			return flt(value)
 		except:
-			frappe.msgprint(_("Unable to find exchange rate"))
+			frappe.msgprint(_("Unable to find exchange rate for {0} to {1}").format(from_currency, to_currency))
 			return 0.0
 	else:
 		return value

erpnext/stock/get_item_details.py

@@ -427,6 +427,9 @@ def get_price_list_currency(price_list):
 		return result.currency
 
 def get_price_list_currency_and_exchange_rate(args):
+	if not args.price_list:
+		return {}
+
 	price_list_currency = get_price_list_currency(args.price_list)
 	plc_conversion_rate = args.plc_conversion_rate