marshalling_issue.rb

it "serializes an array of associated records" do
  item_a = create :image_item
  item_b = PreviewItem.new
  item_b.preview_item_id = item_a.id
  item_b.preview = item_a.preview
  item_b.save!

  items = [item_a, item_b]
  # items = [item_a.reload, item_b.reload]
  items = Marshal.load(Marshal.dump(items))

  items.each do |item|
    expect(item).to be_a(PreviewItem)
  end
end