Validate presence of name and category using backbone.js

public/javascripts/backbone/models/item.js

@@ -7,6 +7,13 @@ var Item = Backbone.Model.extend({
         // If it's not new, then it should POST to /documents/id for an UPDATE action
         return base + (base.charAt(base.length - 1) == '/' ? '' : '/') + this.id;
     },
+    validate: function(attrs) {
+        // Check if name and category were set
+        if (attrs.name === "")
+            return "Name is empty";
+        if (attrs.category === "")
+            return "Category is empty";
+    },
     sync: hybridSync
     // localStorage: new Store("pendingItems")
 });

public/javascripts/backbone/views/edit.js

@@ -19,7 +19,7 @@ App.Views.Edit = Backbone.View.extend({
                 Backbone.history.saveLocation('items/' + model.id);
             },
             error: function() {
-                new App.Views.Error();
+                new App.Views.Error({ message: 'Error saving this item. Did you filled all attributes?' });
             }
         });
 

public/javascripts/backbone/views/notice.js

@@ -22,12 +22,13 @@ App.Views.Notice = Backbone.View.extend({
                 view.remove();
             });
         });
-
         return this;
     }
 });
 
 App.Views.Error = App.Views.Notice.extend({
     className: "error",
-    defaultMessage: 'Uh oh! Something went wrong. Please try again.'
+    defaultMessage: function(error) {
+        return error ? error : 'Uh oh! Something went wrong. Please try again.';
+    }
 });