✨ Add Field#castContainedValues() method

lib/class/field.js

@@ -663,7 +663,41 @@ Field.setMethod(function getRecordValue(record, path_to_value_hint) {
 });
 
 /**
- * Cast the given value to this field's type
+ * Cast the value (could be in a container)
+ *
+ * @author   Jelle De Loecker <[email protected]>
+ * @since    1.4.0
+ * @version  1.4.0
+ *
+ * @param    {*}         value
+ * @param    {boolean}   to_datasource   Is this meant for the datasource?
+ *
+ * @return   {*}
+ */
+Field.setMethod(function castContainedValues(value, to_datasource) {
+
+	if (this.is_translatable && value && this.is_translatable) {
+		let prefix;
+
+		for (prefix in value) {
+			value[prefix] = this.cast(value[prefix], to_datasource);
+		}
+	} else if (this.is_array && value) {
+		let i;
+
+		for (i = 0; i < value.length; i++) {
+			value[i] = this.cast(value[i], to_datasource);
+		}
+	} else {
+		value = this.cast(value, to_datasource);
+	}
+
+	return value;
+});
+
+/**
+ * Cast the given value to this field's type.
+ * Containers should not be passed (like the array or translation object container)
  *
  * @author   Jelle De Loecker <[email protected]>
  * @since    0.2.0