ruby-on-rails - 命令 'rails server' 不工作或 Rails 服务器命令不工作

Question

当我运行“rails server”或“rails s”时出现错误。
您好，我正在学习 Rails，但出现错误
这是错误代码

Traceback (most recent call last):
    52: from bin/rails:2:in `<main>'
    51: from bin/rails:2:in `load'
    50: from /home/wghu/Desktop/HelloRails/bin/spring:7:in `<top (required)>'
    49: from /home/wghu/Desktop/HelloRails/bin/spring:7:in `tap'
    48: from /home/wghu/Desktop/HelloRails/bin/spring:10:in `block in <top (required)>'
    47: from /usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb:85:in `require'
    46: from /usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb:85:in `require'
    45: from /var/lib/gems/2.7.0/gems/spring-3.0.0/lib/spring/binstub.rb:11:in `<top (required)>'
    44: from /var/lib/gems/2.7.0/gems/spring-3.0.0/lib/spring/binstub.rb:11:in `load'
    43: from /var/lib/gems/2.7.0/gems/spring-3.0.0/bin/spring:49:in `<top (required)>'
    42: from /var/lib/gems/2.7.0/gems/spring-3.0.0/lib/spring/client.rb:30:in `run'
    41: from /var/lib/gems/2.7.0/gems/spring-3.0.0/lib/spring/client/command.rb:7:in `call'
    40: from /var/lib/gems/2.7.0/gems/spring-3.0.0/lib/spring/client/rails.rb:28:in `call'
    39: from /var/lib/gems/2.7.0/gems/spring-3.0.0/lib/spring/client/rails.rb:28:in `load'
    38: from /home/wghu/Desktop/HelloRails/bin/rails:4:in `<top (required)>'
    37: from /home/wghu/Desktop/HelloRails/bin/rails:4:in `require_relative'
    36: from /home/wghu/Desktop/HelloRails/config/boot.rb:4:in `<top (required)>'
    35: from /home/wghu/Desktop/HelloRails/config/boot.rb:4:in `require'
    34: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/setup.rb:4:in `<top (required)>'
    33: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap.rb:112:in `default_setup'
    32: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap.rb:70:in `setup'
    31: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/compile_cache.rb:20:in `setup'
    30: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/compile_cache/yaml.rb:50:in `install!'
    29: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/compile_cache/yaml.rb:55:in `init!'
    28: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
    27: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
    26: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
    25: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
    24: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
    23: from /usr/lib/ruby/2.7.0/yaml.rb:4:in `<main>'
    22: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
    21: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
    20: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
    19: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
    18: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
    17: from /usr/lib/ruby/2.7.0/psych.rb:15:in `<main>'
    16: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
    15: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
    14: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
    13: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
    12: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
    11: from /usr/lib/ruby/2.7.0/psych/nodes.rb:2:in `<main>'
    10: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
     9: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
     8: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
     7: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
     6: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
     5: from /usr/lib/ruby/2.7.0/psych/nodes/node.rb:2:in `<main>'
     4: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
     3: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
     2: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
     1: from /var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
/var/lib/gems/2.7.0/gems/bootsnap-1.9.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require': superclass mismatch for class StringIO (TypeError)

我之前运行时的命令

rails g controller home index           

Ubuntu版本

21.10

我的 ruby 版本

ruby 2.7.4p191 (2021-07-07 revision a21a3b7d23) [x86_64-linux-gnu]

谢谢你帮助我

Answer 1

您的 Gemfile? 中指明了哪个 ruby​​ 版本
你安装了吗rbenv或 rvm ruby 版本管理器？
如果不是，我会建议您这样做，因为它会为每个项目(和全局)处理 Ruby 版本 很多更轻松。
你可以在 gorails 中查看这篇文章来安装 rbenv:Install Ruby On Rails on Ubuntu#rbenv
小心 :如果选择安装rbenv请记住，拥有多个版本管理器是 坏想法，所以不要意外地继续安装 rvm .这些并不意味着在同一个系统中共存。只跟进这部分:rbenv install 3.0.2 (或任何你想要的版本——最好是你的 Gemfile 中的那个)rbenv global 3.0.2 (与您安装的版本相同)ruby -v在这些之后请重新运行bundle install在文件夹中并尝试运行 rails s再次。让我们知道这是怎么回事。