Rails 3 自定义初始化程序中未初始化常量...（NameError）

Question

我正在尝试实施描述的联系表单 这里。

当我运行 Rails 服务器时，出现以下错误：

/home/user/project/web/config/initializers/app_config.rb:11:in `<top (required)>': uninitialized constant RailsContactForm (NameError)
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:201:in `block (2 levels) in <class:Engine>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:200:in `each'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:200:in `block in <class:Engine>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `instance_exec'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `run'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:50:in `block in run_initializers'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `each'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `run_initializers'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/application.rb:134:in `initialize!'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
from /home/user/project/web/config/environment.rb:9:in `<top (required)>'
from /home/user/project/web/config.ru:3:in `block in <main>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:46:in `instance_eval'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:46:in `initialize'
from /home/user/project/web/config.ru:1:in `new'
from /home/user/project/web/config.ru:1:in `<main>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:35:in `eval'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:35:in `parse_file'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:162:in `app'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:253:in `wrapped_app'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:204:in `start'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands/server.rb:65:in `start'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:30:in `block in <top (required)>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:27:in `tap'
from /home/user/.rvm/gems/ruby-1.9.2-p290/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>'
/home/user/project/web/config/initializers/app_config.rb:11:in `<top (required)>': uninitialized constant RailsContactForm (NameError)
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:201:in `block (2 levels) in <class:Engine>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:200:in `each'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/engine.rb:200:in `block in <class:Engine>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `instance_exec'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `run'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:50:in `block in run_initializers'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `each'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `run_initializers'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/application.rb:134:in `initialize!'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
from /home/user/project/web/config/environment.rb:9:in `<top (required)>'
from /home/user/project/web/config.ru:3:in `block in <main>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:46:in `instance_eval'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:46:in `initialize'
from /home/user/project/web/config.ru:1:in `new'
from /home/user/project/web/config.ru:1:in `<main>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:35:in `eval'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/builder.rb:35:in `parse_file'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:162:in `app'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:253:in `wrapped_app'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/rack-1.2.3/lib/rack/server.rb:204:in `start'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands/server.rb:65:in `start'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:30:in `block in <top (required)>'
from /home/user/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.7/lib/rails/commands.rb:27:in `tap'
from /home/user/.rvm/gems/ruby-1.9.2-p290/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>'

我可以看到他没有在其他地方定义 RailsContactForm。我对轨道的了解不够，无法知道这是否是故意的。

Answer 1

在这一行中：“RailsContactForm::Application.configure”

RailsContactForm 只是他在运行rails create 时为应用程序指定的名称。只需将其替换为您的应用程序名称即可。

Answer 2

在该教程中，RailsContactForm 是主应用程序的名称。

您需要将其更改为您的应用程序的名称。