ruby-on-rails - Rails、Ruby 1.9.3p0 和 mysql gem

Question

我正在运行 CentOS6 并从源代码安装了 Ruby，还有 Rails 和其他一些员工。

ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]  

rails -v
Rails 3.1.3

一些 gem :

*** LOCAL GEMS ***actionmailer (3.1.3, 2.3.14)actionpack (3.1.3, 2.3.14)activemodel (3.1.3)activerecord (3.1.3, 2.3.14)activeresource (3.1.3, 2.3.14)activesupport (3.1.3, 2.3.14)archive-tar-minitar (0.5.2)arel (2.2.1)bigdecimal (1.1.0)bouncy-castle-java (1.5.0146.1)builder (3.0.0)bundler (1.0.21)coderay (0.9.7)columnize (0.3.5)edavis10-object_daddy (0.4.3)erubis (2.7.0)fastercsv (1.5.0)ffi (1.0.11)hike (1.2.1)hoe (2.12.4)i18n (0.6.0, 0.4.2)io-console (0.3)jruby-openssl (0.7.4)json (1.5.4)linecache19 (0.5.13)mail (2.3.0)metaclass (0.0.1)mime-types (1.17.2)minitest (2.5.1)mocha (0.10.0)multi_json (1.0.4)mysql (2.8.1)mysql2 (0.3.11, 0.2.7)net-ldap (0.2.2)polyglot (0.3.3)rack (1.3.5, 1.1.2)rack-cache (1.1)rack-mount (0.8.3)rack-ssl (1.3.2)rack-test (0.6.1)rails (3.1.3, 2.3.14)railties (3.1.3)rake (0.9.2.2)rdoc (3.9.4)rmagick (2.13.1)ruby-debug-base19 (0.11.26, 0.11.25)ruby-debug19 (0.11.6)ruby-mysql (2.9.4)ruby-openid (2.1.4)ruby_core_source (0.1.5)rubygems-update (1.8.12)rubytree (0.5.2)shoulda (2.11.3, 2.10.3)sprockets (2.0.3)sqlite3 (1.3.5, 0.1.1)sqlite3-ruby (1.3.3, 1.2.5)thor (0.14.6)tilt (1.3.3)treetop (1.4.10)tzinfo (0.3.31)

I need Rails in order to run chiliproject, but when running the following command

RAILS_ENV=production bundle exec rake db:migrate

我得到:

!!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.rake aborted!cannot load such file -- mysqlTasks: TOP => db:migrate => environment(See full trace by running task with --trace)

Now with --trace:

RAILS_ENV=production bundle exec rake db:migrate --trace >> tmp/rake** Invoke db:migrate (first_time)** Invoke environment (first_time)** Execute environment!!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.rake aborted!cannot load such file -- mysql/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in `require'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in `require'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/core_ext/kernel/requires.rb:7:in `block in require_library_or_gem'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/core_ext/kernel/requires.rb:5:in `require_library_or_gem'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/mysql_adapter.rb:61:in `mysql_connection'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in `new_connection'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:in `checkout_new_connection'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in `block (2 levels) in checkout'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `loop'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `block in checkout'/usr/local/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in `checkout'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:in `connection'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in `retrieve_connection'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in `retrieve_connection'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in `connection'/var/www/html/chiliproject/vendor/plugins/awesome_nested_set/lib/awesome_nested_set.rb:218:in `quoted_left_column_name'/var/www/html/chiliproject/vendor/plugins/awesome_nested_set/lib/awesome_nested_set.rb:94:in `acts_as_nested_set'/var/www/html/chiliproject/app/models/issue.rb:33:in `'/var/www/html/chiliproject/app/models/issue.rb:15:in `'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in `require'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:184:in `require'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:291:in `require_or_load'/var/www/html/chiliproject/vendor/plugins/engines/lib/engines/rails_extensions/dependencies.rb:133:in `require_or_load_with_engine_additions'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:451:in `load_missing_constant'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:106:in `const_missing_with_dependencies'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:118:in `const_missing'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:375:in `const_get'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:375:in `block in constantize'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:374:in `each'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/inflector.rb:374:in `constantize'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/core_ext/string/inflections.rb:162:in `constantize'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:157:in `observed_class'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:183:in `observed_classes'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:166:in `initialize'/usr/local/lib/ruby/1.9.1/singleton.rb:141:in `new'/usr/local/lib/ruby/1.9.1/singleton.rb:141:in `block in instance':10:in `synchronize'/usr/local/lib/ruby/1.9.1/singleton.rb:139:in `instance'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:38:in `block in instantiate_observers'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:36:in `each'/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.14/lib/active_record/observer.rb:36:in `instantiate_observers'/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.14/lib/action_controller/dispatcher.rb:15:in `block in define_dispatcher_callbacks'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:182:in `call'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:182:in `evaluate_method'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:166:in `call'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:90:in `block in run'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:90:in `each'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:90:in `run'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/callbacks.rb:276:in `run_callbacks'/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.14/lib/action_controller/dispatcher.rb:51:in `run_prepare_callbacks'/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/initializer.rb:631:in `prepare_dispatcher'/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/initializer.rb:185:in `process'/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/initializer.rb:113:in `run'/var/www/html/chiliproject/config/environment.rb:39:in `'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `block in require'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:547:in `new_constants_in'/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/tasks/misc.rake:4:in `block in '/usr/local/lib/ruby/1.9.1/rake/task.rb:205:in `call'/usr/local/lib/ruby/1.9.1/rake/task.rb:205:in `block in execute'/usr/local/lib/ruby/1.9.1/rake/task.rb:200:in `each'/usr/local/lib/ruby/1.9.1/rake/task.rb:200:in `execute'/usr/local/lib/ruby/1.9.1/rake/task.rb:158:in `block in invoke_with_call_chain'/usr/local/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'/usr/local/lib/ruby/1.9.1/rake/task.rb:151:in `invoke_with_call_chain'/usr/local/lib/ruby/1.9.1/rake/task.rb:176:in `block in invoke_prerequisites'/usr/local/lib/ruby/1.9.1/rake/task.rb:174:in `each'/usr/local/lib/ruby/1.9.1/rake/task.rb:174:in `invoke_prerequisites'/usr/local/lib/ruby/1.9.1/rake/task.rb:157:in `block in invoke_with_call_chain'/usr/local/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'/usr/local/lib/ruby/1.9.1/rake/task.rb:151:in `invoke_with_call_chain'/usr/local/lib/ruby/1.9.1/rake/task.rb:144:in `invoke'/usr/local/lib/ruby/1.9.1/rake/application.rb:116:in `invoke_task'/usr/local/lib/ruby/1.9.1/rake/application.rb:94:in `block (2 levels) in top_level'/usr/local/lib/ruby/1.9.1/rake/application.rb:94:in `each'/usr/local/lib/ruby/1.9.1/rake/application.rb:94:in `block in top_level'/usr/local/lib/ruby/1.9.1/rake/application.rb:133:in `standard_exception_handling'/usr/local/lib/ruby/1.9.1/rake/application.rb:88:in `top_level'/usr/local/lib/ruby/1.9.1/rake/application.rb:66:in `block in run'/usr/local/lib/ruby/1.9.1/rake/application.rb:133:in `standard_exception_handling'/usr/local/lib/ruby/1.9.1/rake/application.rb:63:in `run'/usr/local/bin/rake:32:in `'Tasks: TOP => db:migrate => environment

Does anyone knows what's wrong with mysql gem files?

I also tried to install mysql gem files like this

gem install ruby-mysql2 --no-rdoc --no-ri -- --with-mysql-config=/usr/bin/mysql_config

Answer 1

我只是遇到了类似的问题，你可能正在做我曾经做过的事情:我正在使用“gem list”来确定安装了什么(它列出了 *** LOCAL GEMS *** 就像你显示)并且我看到了 mysql，但是我的项目的 Gemfile 不需要 bundler 来安装 mysql。

如果您只键入 bundle show，它会列出“mysql”吗？如果不是，则 chiliproject 中的 Gemfile 不会导致 bundler 安装 mysql。我发现这一切都非常困惑，直到我意识到我混淆了管理安装的 gem 的不同方法。

如果您或来此的其他人遇到同样的问题，那么这也许会有所帮助。 (也许这种糟糕的解释会鼓励一位 Rails 专家为我们详细说明。)

换句话说，您本地安装的 gem 列表与您应用的 bundle gem 中安装的列表不同(因此 bundler 的名称工具来自)。当您运行您的应用程序并使用 bundler 管理其依赖项时，您必须在 bundler 范围内执行所有操作，以确保它们一起工作。当你这样做时，它实际上非常简单，并为你解决了很多问题，但如果你以前没有使用 bundler 的应用程序经验，那么它只需要一点时间就可以使用到。