ruby-on-rails - 在终端中输入 Rails 命令，返回帮助

Question

当我输入时:

$ rails server

我得到这个返回并输入 rails 命令:

Usage:
  rails new APP_PATH [options]

Options:
  [--edge]                   # Setup the application with Gemfile pointing to Rails repository
  [--dev]                    # Setup the application with Gemfile pointing to your Rails checkout
  -G, [--skip-git]               # Skip Git ignores and keeps
  -m, [--template=TEMPLATE]      # Path to an application template (can be a filesystem path or URL)
  -b, [--builder=BUILDER]        # Path to a application builder (can be a filesystem path or URL)
      [--old-style-hash]         # Force using old style hash (:foo => 'bar') on Ruby >= 1.9
      [--skip-gemfile]           # Don't create a Gemfile
  -d, [--database=DATABASE]      # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
                                 # Default: sqlite3
  -O, [--skip-active-record]     # Skip Active Record files
      [--skip-bundle]            # Don't run bundle install
  -T, [--skip-test-unit]         # Skip Test::Unit files
  -S, [--skip-sprockets]         # Skip Sprockets files
  -j, [--javascript=JAVASCRIPT]  # Preconfigure for selected JavaScript library
                                 # Default: jquery
  -J, [--skip-javascript]        # Skip JavaScript files
  -r, [--ruby=PATH]              # Path to the Ruby binary of your choice
                                 # Default: /usr/bin/ruby1.8

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

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

Description:
    The 'rails new' command creates a new Rails application with a default
    directory structure and configuration at the path you specify.

Example:
rails new ~/Code/Ruby/weblog

This generates a skeletal Rails installation in ~/Code/Ruby/weblog.
See the README in the newly created application to get going.

为什么它不启动服务器？对我来说，这似乎是一个 rails helpDoc 或类似的东西。类似情况也发生在:

$ rails generate

我能做些什么来让这些命令正确启动...

我在 Ubuntu 上使用 Rails 3.1.3 版。

顺便说一句:我是从 myapp 的目录中输入这些的，即

chuckles@.......:~/Blog/new$

我确实通过运行启动了服务器:

$ script/server

来自/新/

Answer 1

我有这个问题。原来我创建了一个用于我的应用程序的 gemset，然后当我切换到终端中的 app 文件夹时，它恢复为不支持我的应用程序的默认 gemset。

你可以检查你使用的是哪个gemset

rvm gemset list

所以在我的应用程序文件夹中，我切换到使用的适当的 gemset。

rvm gemset use [your gemset name]

然后

bundle install

更新 gem 文件。

之后一切正常。