Ruby on rails RubyonRails不能；“启动服务器”；因为",；未初始化常量SampleApp“；_Ruby On Rails_Ruby

Ruby on rails RubyonRails不能；“启动服务器”；因为",；未初始化常量SampleApp“；

ruby-on-rails ruby

Ruby on rails RubyonRails不能；“启动服务器”；因为",；未初始化常量SampleApp“；,ruby-on-rails,ruby,Ruby On Rails,Ruby,我正在用RubyonRails开发一个应用程序，我更改了Rails和Rake的版本rails服务器不再工作： ~/sample_app/config.ru:4:in `block in <main>': uninitialized constant SampleApp (NameError) from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:46:in `instance_eval' from /var/lib/

我正在用RubyonRails开发一个应用程序，我更改了Rails和Rake的版本<代码>rails服务器不再工作：

~/sample_app/config.ru:4:in `block in <main>': uninitialized constant SampleApp (NameError)
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:46:in `instance_eval'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:46:in `initialize'
from /home/sara/Documents/M1/s8/web avancé/projet/sample_app/config.ru:1:in `new'
from /home/sara/Documents/M1/s8/web avancé/projet/sample_app/config.ru:1:in `<main>'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:35:in `eval'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:35:in `parse_file'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:162:in `app'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:253:in `wrapped_app'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:204:in `start'
from /var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands/server.rb:65:in `start'
from /var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:30:in `block in <top (required)>'
from /var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:27:in `tap'
from /var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:27:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

~/sample\u app/config.ru:4:in'block-in'：未初始化的常量SampleApp（NameError）
from/var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:46:in'instance_eval'
from/var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:46:in'initialize'
from/home/sara/Documents/M1/s8/web-avancé/projet/sample_-app/config.ru:1:in'new'
from/home/sara/Documents/M1/s8/web-avancé/projet/sample_-app/config.ru:1:in`'
from/var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:35:in'eval'
from/var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:35:在“parse_文件”中
from/var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:162:in'app'
from/var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:253:in'wrapp'
from/var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:204:in'start'
from/var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands/server.rb:65:in'start'
from/var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:30:in'block in'
from/var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:27:in'tap'
来自/var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:27:in`'
来自脚本/rails:6:in'require'
来自脚本/rails:6:in`'

确保再次运行bundle以更新到rails和rake的较新版本

您更新到了什么版本的rails？-如果有语法错误，请检查config/application.rb中的模块行。这是我在gemefile中看到的：gem'rails'，3.0.7'gem'sqlite3'gem'rake'，0.9.2'您更新到了什么版本的rails？-如果有语法错误，请检查config/application.rb中的模块行。这就是我在gemefile中看到的：gem'rails'，3.0.7'gem'sqlite3'gem'rake'，0.9.2'我正在使用同一个数据库（sqlite3）。您是否再次运行了rake db:migrate？以及bundle？当我再次运行rake db:migrate时，我有：rake中止！Gem:：LoadError：您已经激活了rake 11.1.2，但是您的Gemfile需要rake 0.9.2。使用bundle exec可能会解决这个问题。您是否在gemfile中更改了rake的版本并在rake db:migrate之前运行了bundle？我使用的是同一个数据库（sqlite3），您是否再次运行了rake db:migrate？以及bundle？当我再次运行rake db:migrate时，我有：rake中止！Gem:：LoadError：您已经激活了rake 11.1.2，但是您的Gemfile需要rake 0.9.2。使用bundle exec可能会解决这个问题。在rake db:migrate之前，您是否在GEM文件中更改了rake的版本并运行了bundle？