try_to_load_dependency (ActiveRecord::TestFixtures::ClassMethods)

    # File lib/active_record/fixtures.rb, line 852
          def try_to_load_dependency(file_name)
            require_dependency file_name
          rescue LoadError => e
            # Let's hope the developer has included it himself

            # Let's warn in case this is a subdependency, otherwise
            # subdependency error messages are totally cryptic
            if ActiveRecord::Base.logger
              ActiveRecord::Base.logger.warn("Unable to load #{file_name}, underlying cause #{e.message} \n\n #{e.backtrace.join("\n")}")
            end
          end