Rails new - wrong number of arguments (0 for 1) [closed]

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I have the following inside a new method of an orders_controller

@order = Order.new

Rails gives me the following error:

wrong number of arguments (0 for 1)

app/models/order.rb:2:in `<class:Order>'
app/models/order.rb:1:in `<top (required)>'
app/controllers/orders_controller.rb:33:in `new'

I am using Rails 3.0.5

Thanks!

Edit: order.rb can be found below

class Order < ActiveRecord::Base
  has_many :line_items, :dependent => destroy

  PAYMENT_TYPES = [ "Check", "Credit card", "Purchase order" ]

  validates :name, :address, :email, :pay_type, :presence => true
  validates :pay_type, :inclusion => PAYMENT_TYPES

  def add_line_items_from_cart(cart)
    cart.line_items.each do |item|
      item.cart_id = nil
      line_items << item
    end
  end
end

---

You have a typo in your code. You missed a : in the :destroy

Change :dependent => destroy in line 2 to :dependent => :destroy. It should work.

---

The first declaration in order.rb should read:

  has_many :line_items, :dependent => :destroy