Question

I am going through the Agile Web tutorial with some slight changes. When I run functional tests in Rails 3.2, I am getting the following error:

test_should_get_new(OrdersControllerTest):
ActiveModel::MassAssignmentSecurity::Error: Can't mass-assign protected attributes: cart, deal

Here is the orders_controller_test.rb code:

test "should get new" do
  cart = Cart.create
  session[:cart_id] = cart.id
  LineItem.create(cart: cart, deal: deals(:one))

  get :new
  assert_response :success
end

Here is the orders fixtures:

one:
  name: MyString
  address: MyText
  email: MyString
  pay_type: Check

Here is the line items fixtures:

one:
  deal: one
  order: one

Here is the deals fixture:

one:
  title: MyString
  description: MyText
  image_url: MyString
  price: 9.99

Here is the order controller code:

def new
  @cart = current_cart
  if @cart.line_items.empty?
    redirect_to store_url, notice: "Your cart is empty"
    return
  end

  @order = Order.new

  respond_to do |format|
    format.html # new.html.erb
    format.json { render json: @order }
  end
end

I tried using FactoryGirl but still got the same error message. Here is the code:

test "should get new" do
  cart = FactoryGirl.build(:cart)
  session[:cart_id] = cart.id
  LineItem.create(cart: cart, deal: deals(:one))

  get :new
  assert_response :success
end

And the FactoryGirl code:

FactoryGirl.define do  
  factory :cart do
  end
end

For FactoryGirl I also tried ‘create’ instead of ‘build’ and got the same error message.

Although I could turn off the mass assignment error in config, I would rather not since I prefer to test properly.

Any suggestions please?

Answer 1

Instead of LineItem.create(cart: cart, deal: deals(:one)) try

item = LineItem.create
item.cart = cart
item.deal = deals(:one)

or in your LineItem model, add:

attr_accessible :cart, :deal