Question

在本地开发机器中，

我添加了一个rails g model Place title:string location:string
在seeds.rb
跑rake db:setup

该功能正常运行，因此在具有运行rails应用程序的服务器中，

我git pull编辑了来源，但没有停止正在运行的应用程序
跑rake db:setup
在数据库控制台中检查时创建了表和数据。
向应用发出请求但发生错误：ActiveRecord::StatementInvalid "Could not find table(place)
跑rake db:migrate，然后一切顺利。

在步骤4中可能导致ActiveRecord::StatementInvalid错误的原因是什么？运行db:migrate后，是否始终需要运行db:setup

Rails版本：4.2.3本地和服务器。

正在运行rake db:migrate:status会显示以下输出。

Status   Migration ID    Migration Name
--------------------------------------------------
   up     000             ********** NO FILE **********
   up     20150721031229  Create places

数据库控制台显示以下输出。

sqlite> select * from schema_migrations;
0
20150721031229

编辑：在步骤4中添加了完整的错误回溯

Completed 500 Internal Server Error in 28ms (ActiveRecord: 13.2ms)

ActiveRecord::StatementInvalid (Could not find table 'places'):
  app/models/place.rb:47:in `get_random_place'
  app/models/place.rb:29:in `handle'
  app/controllers/message_controller.rb:27:in `handle'


  Rendered /home/deploy/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_source.erb (4.0ms)
  Rendered /home/deploy/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (1.8ms)
  Rendered /home/deploy/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (0.8ms)
  Rendered /home/deploy/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (16.6ms)

应用程序/模型/ place.rb：47

def self.get_random_place
    offset = rand(Place.count)
    place = Place.offset(offset).first
    place
end

＆＃34;找不到表＆＃34;运行db：setup之后

0 个答案: