Why am I getting NoMethodError with my rails app on AppFog? - ruby-on-rails

Question

I have a rails app on AppFog, connected to a mongo database. It is a very simple database, where I used the mongo_mapper gem to create MVC stuff, and then didn't modify it.
rails g scaffold Contacts name:string address:string email:string phone:string -orm mongo_mapper
REALLY basic! Just trying to test out mongo as a database.
I followed the instructions for talking with the database here.
However, every time I try to access the /contacts path, I get a "500 Internal Server Error" message.
The AppFog logs for my app report:
Started GET "/contacts" for 50.193.89.38 at 2013-04-03 21:18:58 +0000
Processing by ContactsController#index as HTML
Completed 500 Internal Server Error in 0ms
NoMethodError (undefined method `collection' for nil:NilClass):
app/controllers/contacts_controller.rb:5:in `index'
The first chunk of my contacts controller file:
class ContactsController < ApplicationController
# GET /contacts
# GET /contacts.json
def index
#contacts = Contact.all
respond_to do |format|
format.html # index.html.erb
format.json { render json: #contacts }
end
end
....
Any help would be great.
==UPDATE==
$ rails console
irb(main):001:0> Contact.all
=> []
And using rails s works fine, I don't get the 500 error at all.

Answer 1

The name of the model should be singular, ie Contactand not Contacts.
rails g scaffold Contact name:string address:string email:string phone:string -orm mongo_mapper
The way you created, makes the name of the model be Contacts and not Contact. So when you try Contact.all you get nil.