Ruby on rails 如何启动rails服务器

我对Ruby是新手。我想启动我的rails服务器。我已经安装了ruby和rails

ruby -v
ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [i386-mingw32]

rails -v
Rails 6.0.3.3

然后我在VS代码中打开终端并键入：

rails server

Usage:
  rails new APP_PATH [options]

Options:
      [--skip-namespace], [--no-skip-namespace]              # Skip namespace (affects only isolated applications)
  -r, [--ruby=PATH]                                          # Path to the Ruby binary of your choice
                                                             # Default: C:/Ruby27/bin/ruby.exe  
  -m, [--template=TEMPLATE]                                  # Path to some application template (can be a filesystem path or URL)
  -d, [--database=DATABASE]                                  # Preconfigure for selected database (options: mysql/postgresql/sqlite3/oracle/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
                                                             # Default: sqlite3
      [--skip-gemfile], [--no-skip-gemfile]                  # Don't create a Gemfile
  -G, [--skip-git], [--no-skip-git]                          # Skip .gitignore file
      [--skip-keeps], [--no-skip-keeps]                      # Skip source control .keep files  
  -M, [--skip-action-mailer], [--no-skip-action-mailer]      # Skip Action Mailer files
      [--skip-action-mailbox], [--no-skip-action-mailbox]    # Skip Action Mailbox gem
      [--skip-action-text], [--no-skip-action-text]          # Skip Action Text gem
  -O, [--skip-active-record], [--no-skip-active-record]      # Skip Active Record files
      [--skip-active-storage], [--no-skip-active-storage]    # Skip Active Storage files        
  -P, [--skip-puma], [--no-skip-puma]                        # Skip Puma related files
  -C, [--skip-action-cable], [--no-skip-action-cable]        # Skip Action Cable files
  -S, [--skip-sprockets], [--no-skip-sprockets]              # Skip Sprockets files
      [--skip-spring], [--no-skip-spring]                    # Don't install Spring application 
preloader
      [--skip-listen], [--no-skip-listen]                    # Don't generate configuration that depends on the listen gem
  -J, [--skip-javascript], [--no-skip-javascript]            # Skip JavaScript files
      [--skip-turbolinks], [--no-skip-turbolinks]            # Skip turbolinks gem
  -T, [--skip-test], [--no-skip-test]                        # Skip test files
      [--skip-system-test], [--no-skip-system-test]          # Skip system test files
      [--skip-bootsnap], [--no-skip-bootsnap]                # Skip bootsnap gem
      [--dev], [--no-dev]                                    # Setup the application with Gemfile pointing to your Rails checkout
      [--edge], [--no-edge]                                  # Setup the application with Gemfile pointing to Rails repository
      [--rc=RC]                                              # Path to file containing extra configuration options for rails command
      [--no-rc], [--no-no-rc]                                # Skip loading of extra configuration options from .railsrc file
      [--api], [--no-api]                                    # Preconfigure smaller stack for API only apps
  -B, [--skip-bundle], [--no-skip-bundle]                    # Don't run bundle install
  --webpacker, [--webpack=WEBPACK]                           # Preconfigure Webpack with a particular framework (options: react, vue, angular, elm, stimulus)
      [--skip-webpack-install], [--no-skip-webpack-install]  # Don't run Webpack install        

Runtime options:
  -f, [--force]                    # Overwrite files that already exist
  -p, [--pretend], [--no-pretend]  # Run but do not make any changes
  -q, [--quiet], [--no-quiet]      # Suppress status output
  -s, [--skip], [--no-skip]        # Skip files that already exist

Rails options:
  -h, [--help], [--no-help]        # Show this help message and quit
  -v, [--version], [--no-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.

    You can specify extra command-line arguments to be used every time
    'rails new' runs in the .railsrc configuration file in your home directory.

    Note that the arguments specified in the .railsrc file don't affect the
    defaults values shown above in this help message.

Example:
    rails new ~/Code/Ruby/weblog

    This generates a skeletal Rails installation in ~/Code/Ruby/weblog.

---

然而，当我打字时http://localhost:3000/ 在我的网络浏览器（Google chrome）中，我收到了一条错误消息“无法访问此网站。localhost拒绝连接。”根据本教程（）我应该得到，但我没有。我如何修复它呢？

Rails是一个框架，它包含在您安装的包中（在ruby中，包被称为“gems”）。

---

要启动服务器-您需要创建一个项目，进入它的目录并从那里启动

rails服务器。这就是rails建议您做的，当您从其他地方运行它时（它无法识别是否在项目中）
听起来您还没有初始化rails项目

rails new <your project name>

rails新版本

初始化项目后，您可以将
cd
放入已创建并运行
rails s
的项目目录中。是否转到项目目录并尝试此命令？如果没有，请转到rails项目目录并运行
rails s
。它将启动rails服务器