diff --git a/bricks/bricks.js b/bricks/bricks.js
index ac9b146..7751e74 100644
--- a/bricks/bricks.js
+++ b/bricks/bricks.js
@@ -124,6 +124,9 @@ bricks.widgetBuild = async function(desc, widget, data){
 	var klassname = desc.widgettype;
 	var base_url = widget.baseURI;
 	while (klassname == 'urlwidget'){
+		if (data){
+			desc = bricks.apply_data(desc, data);
+		}
 		let url = bricks.absurl(desc.options.url, widget);
 		base_url = url;
 		let method = desc.options.method || 'GET';
diff --git a/bricks/datarow.js b/bricks/datarow.js
index 8bbd31b..4ac9f7d 100644
--- a/bricks/datarow.js
+++ b/bricks/datarow.js
@@ -35,7 +35,11 @@ bricks.DataRow = class extends bricks.HBox {
 			if (header){
 				w = new bricks.BlankIcon({});
 			} else {
-				w = new bricks.UiCheck({name:this.checkField,value:this.user_data[this.checkField]});
+				var v = 0
+				if (this.user_data){
+					v = this.user_data[this.checkField];
+				}
+				w = new bricks.UiCheck({name:this.checkField,value:v});
 				w.bind('changed', this.get_check_state.bind(this));
 			}
 			this.add_widget(w);