Rails db：migrate：reset生成Errno :: EACCES权限被拒绝@unlink_internal

时间：2016-09-09 15:21:15

标签： ruby-on-rails ruby sqlite rubygems railstutorial.org

我正在关注Michael Hartl的Rails教程，并且在某些方面我们要运行 rails db:migrate:reset
但是，每次我尝试这样做时，我都面临有关文件

的权限被拒绝错误
  

development.sqlite3

我尝试过以下我遇到的解决方案：
1. close all programs suspected of using said file and retry task
2. terminate rails console, server, editor and retry task
3. shut/restart pc and executing the task upon restart
4. executing rails db:drop

所有这些都无法允许命令运行。唯一可行的解​​决方案是手动删除文件并运行rails db:migrate

我正在运行

  

Rails 5.0.0.1
  Ruby 2.2.5p319
  Sqlite3 3.14.1
  Windows 10专业版

我的堆栈跟踪是：

  

**调用db：migrate：reset（first_time）
  **调用db：drop（first_time）
  **调用db：load_config（first_time）
  **执行db：load_config
  **调用db：check_protected_environments（first_time）
  **调用环境（first_time）
  **执行环境
  **调用db：load_config
  **执行db：check_protected_environments
  **执行db：drop
  **调用db：drop：_unsafe（first_time）
  **调用db：load_config
  **执行db：drop：_unsafe
  权限被拒绝@ unlink_internal - ％path％/ sample_app / db / development.sqlite3   无法删除数据库＆db; development.sqlite3＆＃39;
  铁轨已中止！
  Errno :: EACCES：权限被拒绝@ unlink_internal - ％path％/ sample_app / db / development.sqlite3
  C：/Ruby22-x64/lib/ruby/2.2.0/fileutils.rb:1450：在remove_file＆＃39;中的unlink'
C:/Ruby22-x64/lib/ruby/2.2.0/fileutils.rb:1450:in块中   C：/Ruby22-x64/lib/ruby/2.2.0/fileutils.rb:1458：在platform_support'
C:/Ruby22-x64/lib/ruby/2.2.0/fileutils.rb:1449:in remove_file＆＃39;
  C：/Ruby22-x64/lib/ruby/2.2.0/fileutils.rb:793：在remove_file'
C:/Ruby22-x64/lib/ruby/2.2.0/fileutils.rb:571:in块中的rm＆＃39;
  C：/Ruby22-x64/lib/ruby/2.2.0/fileutils.rb:570：在each'
C:/Ruby22-x64/lib/ruby/2.2.0/fileutils.rb:570:in rm＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/tasks/sqlite_database_tasks.rb:22:in drop'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/tasks/database_tasks.rb:136:in drop＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/tasks/database_tasks.rb:152：在each_current_configuration中的block in drop_current'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/tasks/database_tasks.rb:292:in块中＆＃39; <登记/>   C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/tasks/database_tasks.rb:291:in each'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/tasks/database_tasks.rb:291:in each_current_configuration＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/tasks/database_tasks.rb:151：在drop_current'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/railties/databases.rake:42:in区块（2级）中＆ ＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:248：在call'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:248:in块中执行＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:243：在each'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:243:in执行＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:187:in block in invoke_with_call_chain'
C:/Ruby22-x64/lib/ruby/2.2.0/monitor.rb:211:in mon_synchronize＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:180：在invoke_with_call_chain'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:173:in调用＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.0.1/lib/active_record/railties/databases.rake:38:in block (2 levels) in <top (required)>'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:248:in来电＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:248：block in execute'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:243:in每个＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:243:in execute'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:187:in块in invoke_with_call_chain＆＃39;
  C：/Ruby22-x64/lib/ruby/2.2.0/monitor.rb:211：在mon_synchronize'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:180:in invoke_with_call_chain＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:209：block in invoke_prerequisites'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:207:in每个＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:207：在invoke_prerequisites'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:186:in块中的invoke_with_call_chain＆＃39;
  C：/Ruby22-x64/lib/ruby/2.2.0/monitor.rb:211：在mon_synchronize'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:180:in invoke_with_call_chain＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/task.rb:173：在invoke'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/application.rb:152:in invoke_task＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/application.rb:108：block (2 levels) in top_level'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/application.rb:108:in每个＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/application.rb:108：在block in top_level'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/application.rb:117:in run_with_threads＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/application.rb:102：在run_rake_task的top_level'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/rake_proxy.rb:13:in块中＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rake-11.2.2/lib/rake/application.rb:178：在standard_exception_handling'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/rake_proxy.rb:10:in run_rake_task＆＃39;
  C：/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:51:in run_command!'
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in＆＃39;
  bin / rails：4：require'
bin/rails:4:in＆＃39;
  任务：TOP =＆gt; db：drop：_unsafe

如何删除此错误并阻止其用于未来的项目？

2 个答案:

答案 0 :(得分：8)

使用Windows 10 Pro时出现同样的错误红宝石2.4.1 | Rails 5.1.4。我喜欢使用：

rake db:drop:_unsafe
rake db:create
rake db:migrate

答案 1 :(得分：0)

在Windows 10，Ruby 2.6.0，Rails 5.2.2上，按照本书中的步骤操作此命令，我遇到了同样的问题。我也在该数据库上同时使用DB Browser for SQLite。

关闭浏览器，rails服务器以及仍在使用数据库的所有其他内容之后，即使重新启动后，我仍然收到错误消息。

为了解决该问题，我不得不通过Windows手动删除development.sqlite3文件，然后执行rails db：migrate

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