NoMethodError in browser but work in Console

I'm a newbie for RoR 3, i have followed instruction from Simple Rails 2 book. I got NoMethodError in browser but when i tried from Console, it works without any error. Can any one help me ?

My full Code can view at Github : https://github.com/iamkevinhuang/shovel/

Error in Browser :

Work in Console :

Can anyone help me ?