Ensure model is passed with <template if>

pkg/mdv/lib/src/template_iterator.dart

Index: pkg/mdv/lib/src/template_iterator.dart
diff --git a/pkg/mdv/lib/src/template_iterator.dart b/pkg/mdv/lib/src/template_iterator.dart
index 6a39418c617e3b19af94349950f03e1b4df4a2a7..c08a70e6fadfdcae3ac6a5ad88f40aaeaee55e30 100644
--- a/pkg/mdv/lib/src/template_iterator.dart
+++ b/pkg/mdv/lib/src/template_iterator.dart
@@ -43,10 +43,19 @@ void _addBindings(Node node, model, [BindingDelegate delegate]) {
 }
 
 void _addAttributeBindings(Element element, model, delegate) {
-  element.attributes.forEach((name, value) {
-    if (value == '' && (name == 'bind' || name == 'repeat')) {
-      value = '{{}}';
+  var attrs = new LinkedHashMap.from(element.attributes);
+  if (element.isTemplate) {
+    // Accept 'naked' bind & repeat.
+    if (attrs['bind'] == '') attrs['bind'] = '{{}}';
+    if (attrs['repeat'] == '') attrs['repeat'] = '{{}}';
+    if (attrs.containsKey('if') &&
+        !attrs.containsKey('bind') &&
+        !attrs.containsKey('repeat')) {

[Siggi Cherem (dart-lang), 2013/07/23 20:44:14]

might be worth adding a small comment here. Initially I thought we had to also
also check that 'if' was ''. if I understand correctly, the binding of the 'if'
is not relevant. It is only used for the condition, but not for the body of the
template.

[Jennifer Messerly, 2013/07/23 22:12:00]

Done.

+      attrs['bind'] = '{{}}';
     }
+  }
+
+  attrs.forEach((name, value) {
     _parseAndBind(element, name, value, model, delegate);
   });
 }