# File activerecord/lib/active_record/fixtures.rb, line 839
839:       def fixtures(*table_names)
840:         if table_names.first == :all
841:           table_names = Dir["#{fixture_path}/*.yml"] + Dir["#{fixture_path}/*.csv"]
842:           table_names.map! { |f| File.basename(f).split('.')[0..-2].join('.') }
843:         else
844:           table_names = table_names.flatten.map { |n| n.to_s }
845:         end
846: 
847:         self.fixture_table_names |= table_names
848:         require_fixture_classes(table_names)
849:         setup_fixture_accessors(table_names)
850:       end

     # File activerecord/lib/active_record/fixtures.rb, line 864
864:       def require_fixture_classes(table_names = nil)
865:         (table_names || fixture_table_names).each do |table_name|
866:           file_name = table_name.to_s
867:           file_name = file_name.singularize if ActiveRecord::Base.pluralize_table_names
868:           try_to_load_dependency(file_name)
869:         end
870:       end

     # File activerecord/lib/active_record/fixtures.rb, line 835
835:       def set_fixture_class(class_names = {})
836:         self.fixture_class_names = self.fixture_class_names.merge(class_names)
837:       end

     # File activerecord/lib/active_record/fixtures.rb, line 872
872:       def setup_fixture_accessors(table_names = nil)
873:         table_names = [table_names] if table_names && !table_names.respond_to?(:each)
874:         (table_names || fixture_table_names).each do |table_name|
875:           table_name = table_name.to_s.tr('.', '_')
876: 
877:           define_method(table_name) do |*fixtures|
878:             force_reload = fixtures.pop if fixtures.last == true || fixtures.last == :reload
879: 
880:             @fixture_cache[table_name] ||= {}
881: 
882:             instances = fixtures.map do |fixture|
883:               @fixture_cache[table_name].delete(fixture) if force_reload
884: 
885:               if @loaded_fixtures[table_name][fixture.to_s]
886:                 @fixture_cache[table_name][fixture] ||= @loaded_fixtures[table_name][fixture.to_s].find
887:               else
888:                 raise StandardError, "No fixture with name '#{fixture}' found for table '#{table_name}'"
889:               end
890:             end
891: 
892:             instances.size == 1 ? instances.first : instances
893:           end
894:           private table_name
895:         end
896:       end

     # File activerecord/lib/active_record/fixtures.rb, line 852
852:       def try_to_load_dependency(file_name)
853:         require_dependency file_name
854:       rescue LoadError => e
855:         # Let's hope the developer has included it himself
856: 
857:         # Let's warn in case this is a subdependency, otherwise
858:         # subdependency error messages are totally cryptic
859:         if ActiveRecord::Base.logger
860:           ActiveRecord::Base.logger.warn("Unable to load #{file_name}, underlying cause #{e.message} \n\n #{e.backtrace.join("\n")}")
861:         end
862:       end

     # File activerecord/lib/active_record/fixtures.rb, line 898
898:       def uses_transaction(*methods)
899:         @uses_transaction = [] unless defined?(@uses_transaction)
900:         @uses_transaction.concat methods.map(&:to_s)
901:       end

     # File activerecord/lib/active_record/fixtures.rb, line 903
903:       def uses_transaction?(method)
904:         @uses_transaction = [] unless defined?(@uses_transaction)
905:         @uses_transaction.include?(method.to_s)
906:       end