Rails，Ruby 1.9.3p0和mysql gem

Question

我正在運行CentOS6並從源代碼安裝Ruby，以及Rails和其他一些工作人員。

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

rails -v
Rails 3.1.3

一些寶石：

*** 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)

我需要Rails才能運行chiliproject ，但是在運行以下命令時

RAILS_ENV=production bundle exec rake db:migrate

我明白了：

!!! 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

Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)

現在使用--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

有誰知道mysql gem文件有什么問題？

我也試過像這樣安裝mysql gem文件

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

Answer 1

我只是遇到了類似的問題，你可能正在做我的工作：我正在使用'gem list'來確定安裝的內容（它列出*** LOCAL GEMS ***就像你展示的那樣）並且我看到了mysql ，但是我的項目的Gemfile不需要bundler來安裝mysql 。

如果你只是鍵入bundle show它列出'mysql'？ 如果沒有，那么Gemfile中的chiliproject不會導致bundler安裝mysql 。 我發現這一切都非常令人困惑，直到我意識到我混淆了管理寶石安裝的不同方法。

如果你或其他人以這種方式遇到同樣的問題，那么這可能是有幫助的。 （也許這個糟糕的解釋會鼓勵其中一位鐵路大師為我們詳細說明。）

換句話說，本地安裝的寶石列表與應用程序的寶石包中安裝的列表不同（因此bundler工具的名稱來自bundler ）。 當您運行應用程序並使用bundler管理其依賴項時，您必須在bundler范圍內執行所有操作，以確保它們一起工作。 當你這樣做時，它實際上是非常直接的，並為你解決了很多問題，但如果你從以前的經驗中找到沒有使用bundler應用程序，那么它只需要一點點習慣。

Answer 2

對我有用的2個步驟：

1. 從/libhttp://dev.mysql.com/get/Downloads/Connector-C/mysql-connector-c-noinstall-6.0.2-win32.zip/from/pick復制文件libmySQL.dll（在文件夾中/ lib /）在c：/ your / path / to / ruby​​ / bin中（確保你的ruby bin在你的系統PATH環境變量中）

2. 使用ruby1.8為MySQL提供了默認設置。 如果您使用MySQL和ruby1.9運行Redmine，請在/config/database.yml文件中用mysql2替換適配器名稱http://www.redmine.org/issues/10566

Answer 3

只需在捆綁安裝上試試這個>>

bundle install --without=test development sqlite postgres mysql rmagick

這將安裝所有必需的基本依賴項，mysql2數據庫適配器原因mysql適配器與Ruby 1.9不兼容

並且不要忘記更改config / database.yml - > s / mysql / mysql2

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