bundle exec rake test:models throws Errno::EACCES: Permission denied答案

【问题标题】：bundle exec rake test:models throws Errno::EACCES: Permission deniedbundle exec rake test:models throws Errno::EACCES: Permission denied
【发布时间】：2014-11-23 06:00:03
【问题描述】：

我正在做railstutorial 的草稿版本，当我尝试运行bundle exec rake test:models 时收到以下错误消息：

rake aborted!
Errno::EACCES: Permission denied - C:/Users/Alex/Desktop/Workspace/Rails/sample_
app/db/test.sqlite3
C:/Users/Alex/Desktop/Workspace/Rails/sample_app/test/test_helper.rb:3:in `<top
(required)>'
C:/Users/Alex/Desktop/Workspace/Rails/sample_app/test/helpers/application_helper
_test.rb:1:in `<top (required)>'
Tasks: TOP => test:run => test:units
(See full trace by running task with --trace)

使用--trace：

** Invoke test (first_time)
** Execute test
** Invoke test:run (first_time)
** Invoke test:units (first_time)
** Invoke test:prepare (first_time)
** Execute test:prepare
** Execute test:units
rake aborted!
Errno::EACCES: Permission denied - C:/Users/Alex/Desktop/Workspace/Rails/sample_
app/db/test.sqlite3
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/fileutils.rb:1432:in `unlink'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/fileutils.rb:1432:in `block in remove
_file'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/fileutils.rb:1440:in `platform_suppor
t'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/fileutils.rb:1431:in `remove_file'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/fileutils.rb:785:in `remove_file'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/fileutils.rb:563:in `block in rm'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/fileutils.rb:562:in `each'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/fileutils.rb:562:in `rm'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/sqlite_database_tasks.rb:22:in `drop'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/sqlite_database_tasks.rb:26:in `purge'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/database_tasks.rb:159:in `purge'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/database_tasks.rb:201:in `load_schema_for'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/database_tasks.rb:216:in `block in load_schema_current'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/database_tasks.rb:255:in `block in each_current_configurat
ion'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/database_tasks.rb:254:in `each'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/database_tasks.rb:254:in `each_current_configuration'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/tasks/database_tasks.rb:215:in `load_schema_current'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/migration.rb:402:in `load_schema_if_pending!'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/migration.rb:409:in `block in maintain_test_schema!'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/migration.rb:637:in `suppress_messages'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/migration.rb:414:in `method_missing'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activerecord-4.2.0.beta1/li
b/active_record/migration.rb:409:in `maintain_test_schema!'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.2.0.beta1/lib/ra
ils/test_help.rb:19:in `<top (required)>'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `require'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `block in require'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:233:in `load_dependency'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `require'
C:/Users/Alex/Desktop/Workspace/Rails/sample_app/test/test_helper.rb:3:in `<top
(required)>'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `require'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `block in require'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:233:in `load_dependency'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `require'
C:/Users/Alex/Desktop/Workspace/Rails/sample_app/test/helpers/application_helper
_test.rb:1:in `<top (required)>'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `require'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `block in require'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:233:in `load_dependency'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-4.2.0.beta1/l
ib/active_support/dependencies.rb:248:in `require'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.2.0.beta1/lib/ra
ils/test_unit/sub_test_task.rb:114:in `block (3 levels) in define'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.2.0.beta1/lib/ra
ils/test_unit/sub_test_task.rb:114:in `each'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.2.0.beta1/lib/ra
ils/test_unit/sub_test_task.rb:114:in `block (2 levels) in define'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.2.0.beta1/lib/ra
ils/test_unit/sub_test_task.rb:113:in `each'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.2.0.beta1/lib/ra
ils/test_unit/sub_test_task.rb:113:in `block in define'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:240:in `call'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:240:in `block in execute'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:235:in `each'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:235:in `execute'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:179:in `block in invoke_with_call_chain'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:172:in `invoke_with_call_chain'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:201:in `block in invoke_prerequisites'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:199:in `each'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:199:in `invoke_prerequisites'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:178:in `block in invoke_with_call_chain'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:172:in `invoke_with_call_chain'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:165:in `invoke'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.2.0.beta1/lib/ra
ils/test_unit/sub_test_task.rb:20:in `invoke_rake_task'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.2.0.beta1/lib/ra
ils/test_unit/testing.rake:8:in `block in <top (required)>'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:240:in `call'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:240:in `block in execute'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:235:in `each'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:235:in `execute'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:179:in `block in invoke_with_call_chain'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:172:in `invoke_with_call_chain'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/task.r
b:165:in `invoke'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:150:in `invoke_task'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:106:in `block (2 levels) in top_level'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:106:in `each'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:106:in `block in top_level'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:115:in `run_with_threads'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:100:in `top_level'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:78:in `block in run'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:176:in `standard_exception_handling'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/lib/rake/applic
ation.rb:75:in `run'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/rake-10.3.2/bin/rake:33:in
`<top (required)>'
C:/RailsInstaller/Ruby2.0.0/bin/rake:23:in `load'
C:/RailsInstaller/Ruby2.0.0/bin/rake:23:in `<main>'
Tasks: TOP => test:run => test:units

我已尝试检查我的 db 文件夹的权限，并尝试重新启动所有内容。我在 Windows 上使用 rails 版本 4.2.0beta1。当我制作“用户”模型时，问题就开始了。我也尝试回滚并再次向上迁移。

编辑：我的测试数据库似乎以某种方式损坏。如果我将 /config/database.yml 测试：更改为 /db/development.sqlite 测试工作。

【问题讨论】：

标签： ruby-on-rails sqlite rake

【解决方案1】：

我把旧的test.sqlite3删掉了，换了一份development.sqlite3，重命名为test.sqlite3，看来问题解决了。

【讨论】：

是的，它也解决了我的问题，但问题是它为什么会发生
是的，我也想知道这一点，它一直在定期发生，这个修复似乎只是对实际问题症状的临时破解。但是我最近将我的开发操作系统从 Windows 8 更改为 kubuntu，我再也没有体验过它。 @Dexture 你的操作系统是什么？知道它是否真的是一个 Windows 问题可能有助于理解“为什么”......
windows ，但昨晚我最终在虚拟机上安装了 Fedora。这就是为什么大多数开发人员更喜欢 window for rails 。

【解决方案2】：

在运行测试之前运行rake db:migrate RAILS_ENV=test。

我不是Rails专家，所以我不知道在迁移开发数据库时是否应该自动迁移测试数据库，但这会迁移它，它解决了我的类似问题。

注意：我的操作系统是 Windows 8.1

【讨论】：

【解决方案3】：

是的，问题出在 Windows 上。当您阅读在 railsinstaller 目录中找到的 fileutils.rb 的代码时。它想要取消链接并想要授予权限 700（在 unix/linux 中找到）但不在 Windows 中。所以行不通。

这是来自 fileutil.rb 文件的 sn-p。

def remove_file
  platform_support {
    File.unlink path
  }
end

def platform_support
  return yield unless fu_windows?
  first_time_p = true
  begin
    yield
  rescue Errno::ENOENT
    raise
  rescue => err
    if first_time_p
      first_time_p = false
      begin
        File.chmod 0700, path()   # Windows does not have symlink
        retry
      rescue SystemCallError
      end
    end
    raise err
  end
end

【讨论】：

【解决方案4】：

我注意到，如果我打开一个终端运行 rails 服务器，而另一个终端运行，就会发生这种情况。当我尝试删除或重置数据库时，我的工作终端给我带来了问题。我关闭服务器再试一次，它工作正常。

【讨论】：