Update another record on after_save on model

campaign.rb

after_save :bid_adjusts


def bid_adjusts
    unless @old_exclusive_campaign.nil?
      campaign = Campaign.find(@old_exclusive_campaign.id)
      campaign.update_attributes(exclusivity: false)
      campaign.save
    end
end

describe "once an exclusive campaign is created" do
  context "takes over exclusivity from an old campaign" do
    let(:old_campaign) { FactoryGirl.create(:campaign_exclusive, :name => "Old Exclusive", :bid => 3) }

    it "should set to false the exclusivity field of old campaign", run: true do
      FactoryGirl.create(:campaign_exclusive, bid: 4)
      # may or may not need to do old_campaign.reload
      old_campaign.exclusivity.should be_false
    end
  end
end

I don't know if you need to reload the old_campaign object... as we're using let