RSpec test ArgumentError: When assigning attributes, you must pass a hash as an argument

Question

I am trying to run the following test for one of my models:

let(:customer) { create :customer }
let(:ticket) { create :ticket, reserved_by: customer }
let(:order) { Order.new(customer: customer, ticket_order_tickets: [ticket]) }

it 'creates the ticket order with the correct ticket' do
  expect(order.ticket_orders.first.ticket).to be ticket
end

With this code in my model to assign the ticket_order_tickets:

def ticket_order_tickets=(tickets_for_ticket_orders)
  tickets_for_ticket_orders.each do |ticket|
    ticket_orders.build(ticket) if ticket.reserved_by?(customer)
  end
end

But when I run the test, I get the following error:

Failure/Error: let(:order) { Order.new(customer: customer, ticket_order_tickets: tickets) }
     ArgumentError:
       When assigning attributes, you must pass a hash as an argument.

dodecaphonic · Accepted Answer · 2015-09-10 00:59:24Z

1

The each block in ticket_order_tickets is calling build on the ticket_orders relation passing in whatever's in tickets_for_ticket_orders. In your setup, it's single item array containing an actual Ticket, and build (like create) expects a Hash of attributes. That seems to be the issue.

answered Sep 10, 2015 at 0:59

dodecaphonic

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