Fix bug with enumSource

Author: jdorn

src/editors/select.js

@@ -221,53 +221,55 @@ JSONEditor.defaults.editors.select = JSONEditor.AbstractEditor.extend({
             items = vars[this.enumSource[i].source];
           }
 
-          // Only use a predefined part of the array
-          if(this.enumSource[i].slice) {
-            items = Array.prototype.slice.apply(items,this.enumSource[i].slice);
-          }
-          // Filter the items
-          if(this.enumSource[i].filter) {
-            var new_items = [];
-            for(j=0; j<items.length; j++) {
-              if(this.enumSource[i].filter({i:j,item:items[j]})) new_items.push(items[j]);
-            }
-            items = new_items;
-          }
-          
-          var item_titles = [];
-          var item_values = [];
-          for(j=0; j<items.length; j++) {
-            var item = items[j];
-            
-            // Rendered value
-            if(this.enumSource[i].value) {
-              item_values[j] = this.enumSource[i].value({
-                i: j,
-                item: item
-              });
+          if(items) {
+            // Only use a predefined part of the array
+            if(this.enumSource[i].slice) {
+              items = Array.prototype.slice.apply(items,this.enumSource[i].slice);
             }
-            // Use value directly
-            else {
-              item_values[j] = items[j];
+            // Filter the items
+            if(this.enumSource[i].filter) {
+              var new_items = [];
+              for(j=0; j<items.length; j++) {
+                if(this.enumSource[i].filter({i:j,item:items[j]})) new_items.push(items[j]);
+              }
+              items = new_items;
             }
 
-            // Rendered title
-            if(this.enumSource[i].title) {
-              item_titles[j] = this.enumSource[i].title({
-                i: j,
-                item: item
-              });
-            }
-            // Use value as the title also
-            else {
-              item_titles[j] = item_values[j];
+            var item_titles = [];
+            var item_values = [];
+            for(j=0; j<items.length; j++) {
+              var item = items[j];
+              
+              // Rendered value
+              if(this.enumSource[i].value) {
+                item_values[j] = this.enumSource[i].value({
+                  i: j,
+                  item: item
+                });
+              }
+              // Use value directly
+              else {
+                item_values[j] = items[j];
+              }
+              
+              // Rendered title
+              if(this.enumSource[i].title) {
+                item_titles[j] = this.enumSource[i].title({
+                  i: j,
+                  item: item
+                });
+              }
+              // Use value as the title also
+              else {
+                item_titles[j] = item_values[j];
+              }
             }
+            
+            // TODO: sort
+            
+            select_options = select_options.concat(item_values);
+            select_titles = select_titles.concat(item_titles);
           }
-          
-          // TODO: sort
-          
-          select_options = select_options.concat(item_values);
-          select_titles = select_titles.concat(item_titles);
         }
       }