rspec let confusion.rb

require 'spec_helper'

describe 'foo' do
  let(:concert) { FactoryGirl.create :concert } # Creates a concert with name 'default'

  before do
    Foo.bar(concert.id)
  end

  describe '.bar' do
    it 'should be baz' do
      concert.name.should == 'baz' # Fails
      puts concert.name #=> 'default'
    end
  end
end

# elsewhere...

class Foo
  def self.bar(concert_id)
    concert = Concert.find_by_id(concert_id)
    concert.name = 'baz'
    concert.save
  end
end