Rails 4 不检测应用程序 [英] Rails 4 doesn't detect application

问题描述

更新到 Rails 4 后，我试图启动服务器，但它无法启动.简单地说，应用程序似乎没有被检测到"，就像那里没有应用程序一样.

After updating to Rails 4, I'm trying to start the server, but it won't start. Simply put, the application doesn't seem to get "detected", like there is no application in there.

~ $ bundle exec rails server
Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]              # Path to the Ruby binary of your choice
                                 # Default: /app/vendor/ruby-2.0.0/bin/ruby
  -b, [--builder=BUILDER]        # Path to some application builder (...
  -m, [--template=TEMPLATE]      # Path to some application template (...
      [--skip-gemfile]           # Don't create a Gemfile
  -B, [--skip-bundle]            # Don't run bundle install

奇怪的是，(较旧的)系统 gem 可以让它很好地启动，但不适用于 Bundler.

What is weird is that the (older) system gem will make it start just fine, but not with Bundler.

为什么 Rails 无法启动?

Why won't Rails start?

我尝试浏览 CLI 源代码，但我无法掌握发生了什么.

I tried navigating the CLI source code, but I can't grip what's going on.

(使用 Edge Rails 4.0.0.beta 和 Ruby 2.0.0.rc)

(Using Edge Rails 4.0.0.beta and Ruby 2.0.0.rc)

如果您想知道，这里是目录列表:

In case you're wondering, here's the directory listing:

~ $ ls
app  config db    Gemfile   lib  mock    Rakefile   script  tmp
bin  config.ru  features  Gemfile.lock  log  public  README.md  spec    vendor

推荐答案

Rails 4 确实改变了它的启动方式.

Rails 4 did change the way it boots up.

幸运的是，您不必运行 rails-new，因为有一个方便的任务.

Fortunately, you don't have to run rails-new, since there is a handy task for that.

Rails 4 发行说明:

• 您应用的可执行文件现在位于 bin/ 目录中.运行 rake rails:update:bin 得到 bin/bundle、bin/rails 和 bin/rake.

6.1  Notable changes

• Your app's executables now live in the bin/ dir. Run rake rails:update:bin to get bin/bundle, bin/rails, and bin/rake.

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