Make Factory Girl's `create` method give the name of the class that raises ActiveRecord::RecordInvalid. Useful when you have nested factories whose models have attributes with similar names ex. `name`.

test_helper.rb

include FactoryGirl::Syntax::Methods                                                                                                                   
                                                                                                                                                       
def create_with_info(*args, &block)                                                          
  create_without_info(*args, &block)                                                                                                                 
rescue => e                                                                                                                                            
  raise unless e.is_a? ActiveRecord::RecordInvalid                                                                                                     
  raise $!, "#{e.message} (Class #{e.record.class.name})", $!.backtrace                                                                                
end
                                                                                                                                                 
alias_method_chain :create, :info