Fix for issue 1338, should allow for future between rules on nested properties

src/js/rulesAssistant.js

@@ -200,8 +200,20 @@ window.ruleAppliesP = function ruleAppliesP(cond, slave) {
 			flag = false;
 			break;
 		case "between": // between two values of a slave's attribute
+			let slaveAttribute = slave[cond.data.attribute];
+			if (slaveAttribute === undefined && cond.data.attribute.includes(".")) {
+				slaveAttribute = cond.data.attribute
+				.split(".")
+				.reduce(
+					(reduceSlave, attribute) =>
+					(reduceSlave && reduceSlave[attribute] !== undefined)
+						? reduceSlave[attribute]
+						: undefined,
+					slave
+				);
+			}			
 			flag = between(
-				slave[cond.data.attribute],
+				slaveAttribute,
 				cond.data.value[0],
 				cond.data.value[1]);
 			break;