ruby-on-rails - rails - 启动服务器时出现问题

Question

我正在尝试在 Rails 应用程序上启动服务器。对于某些应用程序，它工作正常，其他应用程序我收到此消息:

rails s
Usage:
  rails new APP_PATH [options]

Options:
      [--skip-gemfile]        # Don't create a Gemfile
  -d, [--database=DATABASE]   # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db)
                              # Default: sqlite3
  -O, [--skip-active-record]  # Skip Active Record files
      [--dev]                 # Setup the application with Gemfile pointing to your Rails checkout
  -J, [--skip-prototype]      # Skip Prototype files
  -T, [--skip-test-unit]      # Skip Test::Unit files
  -G, [--skip-git]            # Skip Git ignores and keeps
  -r, [--ruby=PATH]           # Path to the Ruby binary of your choice
                              # Default: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
  -m, [--template=TEMPLATE]   # Path to an application template (can be a filesystem path or URL)
  -b, [--builder=BUILDER]     # Path to an application builder (can be a filesystem path or URL)
      [--edge]                # Setup the application with Gemfile pointing to Rails repository

Runtime options:
  -q, [--quiet]    # Supress status output
  -s, [--skip]     # Skip files that already exist
  -f, [--force]    # Overwrite files that already exist
  -p, [--pretend]  # Run but do not make any changes

Rails options:
  -h, [--help]     # Show this help message and quit
  -v, [--version]  # Show Rails version number and quit

我正在使用 Rails 3.0.3 和 ruby​​ 1.8.7

Answer 1

我认为您正在尝试使用此命令运行 Rails 2.x 应用程序。它将失败并显示此消息。由于它在某些应用程序上一直失败，请检查它们是否是 Rails 2.x 应用程序。

您只能使用此命令运行 Rails 3.x 应用程序。