cleanup render()

gadget_json_generated_form.js

@@ -1429,8 +1429,7 @@
       return this.loadJSONSchema(arr[0], arr[1]);
     })
     .declareMethod('render', function (options) {
-      var g = this,
-        queue;
+      var g = this;
       g.props.toplevel = true;
       // contain map of current normalized schema
       // json pointer and corresponding url
@@ -1438,19 +1437,18 @@
       g.props.schema = {};
       g.props.schema_map = {};
       g.props.schema_cache = {};
-      g.options = options;
-      if (!options.value) {
-        options.value = {};
-      }
-      if (options.schema) {
-        queue = RSVP.Queue()
+      return RSVP.Queue()
         .push(function () {
+          if (options.schema) {
             return options.schema;
-          });
-      } else {
-        queue = g.loadJSONSchema(options.schema_url);
           }
-      return queue
+          var schema_url = options.schema_url ||
+            (options.value && options.value.$schema);
+          if (schema_url) {
+            return g.loadJSONSchema(schema_url);
+          }
+          return {};
+        })
         .push(function (schema) {
           g.options.schema = schema;
           return g.renderForm({