How to Test Multimodel Paperclip attachments?

Rails
#1

I’m using Rspec and FactoryGirl to create specs for multimodel paperclip
attachments. From searching other questions, it seems like a single
image attachment is more common.

Car.rb

class Car < ActiveRecord::Base
  has_many :uploads, dependent: :destroy

  validates :uploads, presence: { message: 'You must upload at least

one image’ }

  accepts_nested_attributes_for :uploads, allow_destroy:  true
end

Upload.rb

class Upload < ActiveRecord::Base
  belongs_to :car

  has_attached_file :upload, styles: { medium: '300x300>', thumb:

‘100x100>’ }

  validates_attachment_content_type :upload, content_type:

/\Aimage/.*\Z/
validates_attachment_presence :upload
end

As you can see there is a has_many and belongs_to relationship between
the two.

car_spec.rb

require 'spec_helper'

describe Car do
  before do
    @car = Car.new(FactoryGirl.attributes_for(:car))
  end

  subject { @car }

  it { should respond_to(:uploads) }

  it { should be_valid }
end

cars.rb factory

FactoryGirl.define do
  factory :car do
    # Something
    uploads
  end
end

I have tried uploads { FactoryGirl.create!(:upload) } as well as using
the fixture_file_upload directly on the Car’s uploads attribute. Also
I read about Associations,but I wasn’t sure how that work.

For the upload factory I’ve done how you would test an individual
attachment

Uploads.rb

include ActionDispatch::TestProcess

FactoryGirl.define do
  factory :upload do
    upload { fixture_file_upload(Rails.root.join('spec', 'fixtures',

‘support’, ‘test.jpg’), ‘image/jpeg’) }
end
end