gem，使用 gem install rails --no-ri --no-rdoc 这样就告诉 bundler 不要下载 RDoc 和集成 ri 文件

gem install --no-rdoc --no-ri jekyll Fetching: liquid-3.0.6.gem (100%) Fetching: kramdown-1.9.0.gem (100%) Fetching: mercenary-0.3.5.gem

我在 environment.rb 中添加了一句 config.gem 'tiny_mce'，具体如下： Load the rails application require File.expand_path('../application

我在运行一个 rb 之后，CTRL+C to stop，重新修改了同一个 rb 文件，然后再 ruby xx.rb ruby app_get.rb

Completed 500 Internal Server Error in 211ms RSolr::Error::Http (RSolr::Error::Http - 404 Not

Gem。 一开始我很疑惑，为什么同一个 Gem，同一个版本号，要保存四份？ 据大牛回答，有些 Gem 需要编译， 所以依赖 Ruby 版本。比如在 Ruby

gem list *** LOCAL GEMS *** actionmailer (2.2.2) actionpack (2.2.2) activerecord (2.2.2) activeresource (2.2.2) activesupport (2.2.2) bundler

Gemfile: group :test, :development do gem "rspec-rails" gem 'factory_bot_rails' end 这是 spec

gemset 供项目使用： rvm gemset create rails-x 你可以叫它 rails-x, my-ex-girlfriend，你开心就好！ 然后安装一下

Gem::Ext::BuildError: ERROR: Failed to build gem native extension. current directory: /tmp/bundler20160927-13647-olua81json-1.8.1/gems/json-1.8.1/ext/json/ext/generator /usr/local/bin/ruby -r ./siteconf20160927-13647-pqk3gf.rb

Gemfile 中写了 gem "therubyracer" 据说要安装两个 gem gem install libv8 gem install therubyracer 执行 gem install

Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/launchy-2.2.0.gemspec] isn't a Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/netrc-0.7.7.gemspec] isn't a Gem::Specification

gem install bundler --no-ri --no-rdoc Password: ERROR: While executing gem ... (Gem::Exception) Unable

gem 升级到 rails 3.2.6, (其他版本一样, 出错) Gems included by the bundle: * actionmailer (3.2.6) * actionpack (3.2.6) * activemodel

创建了一个 model，对应我现有的硬件资产，如下 create_table "hardwares", force: :cascade do |t| t.string "AssetNum", null: false

GemNotFound) App 11000 output: /var/lib/gems/2.3.0/gems/bundler-1.16.2/lib/bundler/spec_set.rb:91:in `block in materialize' App 11000 output: /var/lib/gems/2.3.0/gems/bundler-1.16.2/lib/bundler/spec_set.rb:85:in `map!' App 11000 output

gem 网站的前端使用: gem 'bootstrap-sass', '~> 3.3.7', 后端使用: gem 'rails', '~> 5.2', 数据库采用: gem 'mysql2', '>= 0.3.13', '< 0.5', 分页插件采用

Gemfile 如下： source 'https://rubygems.org' ruby '2.0.0' gem 'rails', '4.0.0' gem 'bootstrap-sass', '2.3.2.0' group

gem install fpm，发现出错，google 了一圈，只找到要更换成 taobao 源的方案，于是： gem sources --remove http://rubygems.org

看的书是 web 开发敏捷之道 rails 应用…第四版，使用的是 rails3.0.5。然后问题就出现了（之前用的是 4.0）rake 命令一直不能使用，出现的错误是这个样子的 rake

机子使用 rvm 安装的 ruby， 启动速度很慢，用 strace 跟踪了一下发现会加载大量库的 encodeing... 设置为什么？ stat("/home/god/.rvm/gems/ruby-2.2.3/gems/sprockets-3.7.1/lib/irb/lc/en_US.UTF-8/encoding_aliases.rb", 0x7ffc68053d60) = -1 ENOENT

Gem::Ext::BuildError: ERROR: Failed to build gem native extension. current directory: /var/www/sample_app/shared/bundle/ruby/2.3.0/gems/nokogiri-1.6.8/ext/nokogiri /usr/bin/ruby2.3 -r ./siteconf20160909-4619-scgbpp.rb

class Article {where( :status => 0 )} end 在

Gem 犹如 Ruby 的左肩右膀，绝大部分框架都以 Gem 的形式发布。例如： gem install rails 但是，Gem 并不难编写。下面你跟着我走

real 0m1.925s user 0m1.776s sys 0m0.128s 看了下github，在gem中使用 gem 'spork-rails', github: 'railstutorial/spork-rails' 解决了。。 又是坑

想修改原文件，find 了一下 404.html 发现生成的有很多 /var/lib/docker/aufs/mnt/b56ff9d1180c0f04ae7fe029f92c6793a4342ada24539e37a12b53919ff84c8c/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/bulk_insert-1.2.1/test/dummy/public/404.html /var/lib/docker/aufs/mnt/b56ff9d1180c0f04ae7fe029f92c6793a4342ada24539e37a12b53919ff84c8c/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/doorkeeper-4.2.0/spec/dummy/public/404.html /var/lib/docker/aufs/mnt/b56ff9d1180c0f04ae7fe029f92c6793a4342ada24539e37a12b53919ff84c8c/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/derailed_benchmarks-1.3.1/test/rails_app/public/404.html /var/lib/docker/aufs/mnt/b56ff9d1180c0f04ae7fe029f92c6793a4342ada24539e37a12b53919ff84c8c/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/devise-4.2.0/test/rails_app/public/404.html /var/lib/docker/aufs/mnt/b56ff9d1180c0f04ae7fe029f92c6793a4342ada24539e37a12b53919ff84c8c/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/exception_notification-4.2.1/test/dummy/public/404.html /var/lib/docker/aufs/mnt/b56ff9d1180c0f04ae7fe029f92c6793a4342ada24539e37a12b53919ff84c8c/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/generators/rails/app/templates/public/404.html /var/lib/docker/aufs/mnt/b2fea450f6cc0928ecb3a49605eac0dac7992799da8963875b5a3f9155cbf8f2/var/www/homeland/public/404.html /var/lib/docker/aufs/mnt/b2fea450f6cc0928ecb3a49605eac0dac7992799da8963875b5a3f9155cbf8f2/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/bulk_insert-1.2.1/test/dummy/public/404.html /var/lib/docker/aufs/mnt/b2fea450f6cc0928ecb3a49605eac0dac7992799da8963875b5a3f9155cbf8f2/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/doorkeeper-4.2.0/spec/dummy/public/404.html /var/lib/docker/aufs/mnt/b2fea450f6cc0928ecb3a49605eac0dac7992799da8963875b5a3f9155cbf8f2/var/www/homeland/vendor/bundle/ruby/2.3.0/gems/derailed_benchmarks-1.3.1/test/rails_app/public/404.html

F:\RubymineProjects>rails new blog ...... ...... create test/integration/.keep create test/channels/application_cable/connection_test.rb create test/test_helper.rb create test/system create test/system/.keep

gem Using rake (0.9.2.2) Using backports (2.6.2) Using crack (0.3.1) Using diff-lcs (1.1.3) Using

root@iZbp16dzka2qshpg10fy5hZ:/www/homeland-docker# sudo make reindex Reindex ElasticSearch... Starting homeland_postgresql ... done Starting homeland_elasticsearch

gem 安装成功 $ gem install charlock_holmes -v '0.7.3' -- --with-icu-dir=/usr/local/opt/[email protected] --with-cxxflags