Implement recursive field lookup in compat mode

Provides the mustache behavior of recursive lookup without the use of depthed paths.

Note that this does incur a fairly dramatic performance penalty for depthed queries.

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/handlebars/runtime.js b/lib/handlebars/runtime.js
index 530dbd2..ec54f53 100644
--- a/lib/handlebars/runtime.js
+++ b/lib/handlebars/runtime.js
@@ -63,6 +63,14 @@ export function template(templateSpec, env) {
 
   // Just add water
   var container = {
+    lookup: function(depths, name) {
+      var len = depths.length;
+      for (var i = 0; i < len; i++) {
+        if (depths[i] && depths[i][name] != null) {
+          return depths[i][name];
+        }
+      }
+    },
     lambda: function(current, context) {
       return typeof current === 'function' ? current.call(context) : current;
     },