我正在尝试学习Rails，遇到一些我不明白的问题。我从Hartl的书开始，看到这个错误信息，它看起来与我为此做的事情有关。
现在我正在开展一个新项目，当我尝试在我的路线文件上运行测试时，我得到了这个。
1) Error:
test_that_/login_route_opens_the_login_page(CursomRoutesTest):
ActiveRecord::StatementInvalid: Could not find table 'statuses'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/connection_adapters/sqlite_adapter.rb:472:in `table_structure'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/connection_adapters/sqlite_adapter.rb:346:in `columns'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:660:in `column_names'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:652:in `timestamp_column_names'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:585:in `block in table_rows'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:579:in `each'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:579:in `map'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:579:in `table_rows'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:494:in `block (3 levels) in create_fixtures'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:492:in `each'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:492:in `block (2 levels) in create_fixtures'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:491:in `block in create_fixtures'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract_adapter.rb:168:in `disable_referential_integrity'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:476:in `create_fixtures'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:895:in `load_fixtures'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:849:in `setup_fixtures'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:418:in `_run__3689392786993953837__setup__3124079788890242138__callbacks'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:405:in `__run_callback'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:385:in `_run_setup_callbacks'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:81:in `run_callbacks'
/Users/TomEllis/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/activesupport-3.2.13/lib/active_support/testing/setup_and_teardown.rb:35:in `run'
1 tests, 0 assertions, 0 failures, 1 errors, 0 skips
答案 0 :(得分：4)
您可能没有运行rake任务来准备测试数据库：
bundle exec rake db:test:prepare
答案 1 :(得分：1)
bundle exec rake db:test:clone
答案 2 :(得分：1)
我也是一个Rails新手，我遇到了一个非常类似的问题（处理不同的项目，但是引用错误引用Hartl）。在我的头脑中搜索并用谷歌搜索后，我相信我找到了整体问题和解决方案。
不过，有人可以解释一下rails3tutorial对gem的引用以及如何删除它吗？
当我们开始使用rails教程时，Hartl建议我们运行以下命令：
$ rvm use 1.9.3@rails3tutorial2ndEd --create --default
Using /Users/mhartl/.rvm/gems/ruby-1.9.3 with gemset rails3tutorial2ndEd
（http://ruby.railstutorial.org/ruby-on-rails-tutorial-book?version=3.2#sec-install_rubygems）
结果？
...每当我们打开一个新的终端窗口时，都会自动选择1.9.3@rails3tutorial2ndEd Ruby / gemset组合。
我通过运行来解决这个问题：
rvm use 1.9.3-p484 --default
这使得＆＃34;定期＆＃34; gemset我们的默认gemset（与我们的自定义Hart教程gemset相对）。我非常肯定＆＃34;常规宝石＆＃34;这是错误的术语，但我还处于初学阶段，所以我向所有知道正确用语的人道歉。我希望有所帮助！