When I follow the Spree Guides, I got an error message ,
yulong@ubuntu:~/mystore$ rake db:create rake db:create DEPRECATION WARNING: class_inheritable_attribute is deprecated, please use class_attribute method instead. Notice their behavior are slightly different, so refer to class_attribute documentation first. (called from <top (required)> at /home/yulong/mystore/config/application.rb:7) DEPRECATION WARNING: class_inheritable_attribute is deprecated, please use class_attribute method instead. Notice their behavior are slightly different, so refer to class_attribute documentation first. (called from <top (required)> at /home/yulong/mystore/config/application.rb:7) DEPRECATION WARNING: class_inheritable_attribute is deprecated, please use class_attribute method instead. Notice their behavior are slightly different, so refer to class_attribute documentation first. (called from <top (required)> at /home/yulong/mystore/config/application.rb:7) DEPRECATION WARNING: class_inheritable_attribute is deprecated, please use class_attribute method instead. Notice their behavior are slightly different, so refer to class_attribute documentation first. (called from <top (required)> at /home/yulong/mystore/config/application.rb:7) rake aborted! Fixtures is not a class yulong@ubuntu:~/mystore$ rails g spree:site DEPRECATION WARNING: class_inheritable_attribute is deprecated, please use class_attribute method instead. Notice their behavior are slightly different, so refer to class_attribute documentation first. (called from <top (required)> at /home/yulong/mystore/config/application.rb:7) DEPRECATION WARNING: class_inheritable_attribute is deprecated, please use class_attribute method instead. Notice their behavior are slightly different, so refer to class_attribute documentation first. (called from <top (required)> at /home/yulong/mystore/config/application.rb:7) DEPRECATION WARNING: class_inheritable_attribute is deprecated, please use class_attribute method instead. Notice their behavior are slightly different, so refer to class_attribute documentation first. (called from <top (required)> at /home/yulong/mystore/config/application.rb:7) DEPRECATION WARNING: class_inheritable_attribute is deprecated, please use class_attribute method instead. Notice their behavior are slightly different, so refer to class_attribute documentation first. (called from <top (required)> at /home/yulong/mystore/config/application.rb:7) [DEPRECATION WARNING] Nested I18n namespace lookup under "activerecord.attributes.checkout" is no longer supported create lib/spree_site.rb remove public/index.html append public/robots.txt append db/seeds.rb 
