让ruby activerecord与mysql适配器一起工作

我试图在不使用rails的情况下使用activerecord和mysql，但我似乎无法将我的ruby代码连接到mysql。我猜我的require语句或gems的安装方式有问题。以下是：

• 我的剧本
• B.我的本地gem列表显示gem已安装
• C.我的路径变量
• D.我的创业板环境和
• E.我收到的错误消息

请帮帮我，这消耗了我一整天的时间！ （我的

ruby-1.9.3下的珠宝盒中显示了activerecord mysql适配器-P327@rails3tutorial2ndEd

选项，但当我运行

gem list--local时，它不在我的终端中。这可能与此有关吗？

（我还尝试了sudo ln-s/usr/local/mysql/lib/libmysqlclient.18.dylib/usr/lib/libmysqlclient.18.dylib

的解决方案，但它对我不起作用

A.脚本： （在有和没有shebang的情况下进行试验-两者都不起作用）

C.路径的 D.创业板环境 E.错误信息：

/Users/emmanueleye2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site\u ruby/1.9.1/rubygems/dependency.rb:247:in`to_specs'：请安装mysql适配器：`gem install activerecord mysql adapter`（在其中找不到mysql（~>2.8.1）[actionmailer-3.2.8、actionpack-3.2.8、activemodel-3.2.12、activemodel-3.2.8、activerecord-3.2.12、activerecord-3.2.8、activeresource-3.2.8、activesupport-3.2.12、activesupport-3.2.8、addressable-2.3.2、arel-3.0.2、blankslate-2.1.2.2.2.2.4、bluecloth-2.2.2.2.0、builder-3.0.4、bundler-1.2.1.1.1、capybara-1.1.1.2、CGU-2.0、ChildF-2.0、fix-6.0、Childf-61.4.0、咖啡-1.1.0、守护者1.1.1.9，守护者1.1.1.9，守护者1.1.1.9，守护者1.1.0.10，1.1.0.10，1.1.0.10，1.1.1.10，1.1.1.1.1.1.9，1.1.1.1.1.1.1.9，1.1.0.10，1.1.1.0.10，1.1.1.10，1.1.1.1.1.10，1.1.1.1.10，1.1.1.1.1.1.1.1.1.1.10，10，1.1.1.1.1.1.1.1.10，DIF，1.1.1.1.10，1.1.1.1.10，1.1.10，1.1.1.1.10，1.10，rails-2.1.3，json-1.7.5，launchy-2。1.2、1.2、1.2、1.2、1.2、1.1.1、1.4.4、4、mime-1.19、1.1.2.0、1.1.2.0.pre2、1.4.0、1.4.0、1.4.0、1.1.1.1.1.1、1.19、1.1.19、1.1.2、1.2.2.0、1.2.0.2.0、1.2.2.2.2.0.0.0、1.2.2.2.2.0、1.2、1.1.4.4.4.4.0、1.4.4.0、1.4.4.0、1.0、1.4、1.1.4.1.4.4、1.4、1.1.1.4、1.1.1.1.1.3、1.3、1.3、1.3 rake-0.0.2、rake-0.9.2.2、rdoc-3.12、，1.6.7，rspec-2.9.0，rspec-核心-2.9.0，rspec-期望-2.9.1，rspec-2.9.1，rspec-mock-2.9.0，rspec-2.9.0，rspec-1.6.7.7，rspec-1.7.7.7，rspec-1.7.7.7.7.7，rspec-1.7.7.7.7.7，rspec-1.7.7.7.7，rspec-1.7.7.7.7.7.7，rspec-1.7.7，rspec-2.7，rspec-2.7.7.7，rspec-2.0，rspec-2.0，rspec-Rai轨-2.9.9.0，rspec-2.9.0，rspec-2.9.0 0，倾斜-1.3.3，树梢-1.4.12，tzinfo-0.3.35，uglifier-1.3.0，websocket-1.0.4，xpath-0.1.4]）（加载错误）
from/Users/emmanuelleye2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site\u ruby/1.9.1/rubygems/dependency.rb:256:in'to_spec'
from/Users/emmanuelleye2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site\u ruby/1.9.1/rubygems.rb:1231:in'gem'
来自/Users/emmanuelleye2/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.12/lib/active\u record/connection\u adapters/mysql\u adapter.rb:5:in`'
来自/Users/emmanuelleye2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site\u ruby/1.9.1/rubygems/custom\u require.rb:60:in“require”
来自/Users/emmanuelleye2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site\u ruby/1.9.1/rubygems/custom\u require.rb:60:“在require中救援”
来自/Users/emmanuelleye2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site\u ruby/1.9.1/rubygems/custom\u require.rb:35:in“require”
来自/Users/emmanuelleye2/.rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.12/lib/active\u support/dependencies.rb:251:“请求中的块”中
来自/Users/emmanuelleye2/.rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.12/lib/active\u support/dependencies.rb:236:in'load\u dependencity'
来自/Users/emmanuelleye2/.rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.12/lib/active\u support/dependencies.rb:251:in“require”
来自/Users/emmanueleye2/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.12/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:50:in'resolve\u hash\u connection'
来自/Users/emmanuelleye2/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.12/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:29:in'spec'
来自/Users/emmanuelleye2/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.12/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:130:“建立连接”中
来自test.rb:4:in`'

您是否尝试过更改

:adapter => 'mysql'

到

---

你也试过要求mysql吗？是的，我试过分别要求mysql和mysql2。成功了！非常感谢-行成功：1要求“mysql2”2要求“active_record”3 ActiveRecord:：Base.build_connection（4:adapter=>'mysql2'，5:host=>'localhost'，6:username=>'root'，7:password=>'password'，8:database=>'players'）

$ gem list mysql

*** LOCAL GEMS ***

mysql (2.9.1)
mysql2 (0.3.11)

$ gem list activerecord

*** LOCAL GEMS ***

activerecord (3.2.12, 3.2.8)

$ $PATH
-bash: /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/bin:/Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327@global/bin:/Users/emmanueleleyae2/.rvm/rubies/ruby-1.9.3-p327/bin:/Users/emmanueleleyae2/.rvm/bin:/usr/local/mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin: No such file or directory

$ $GEM_PATH
-bash: /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327:/Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327@global: No such file or directory

$ $GEM_HOME
-bash: /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327: is a directory
emmanuel-eleyaes-computer:chapter01 emmanueleleyae2$

$ gem env
RubyGems Environment:
  - RUBYGEMS VERSION: 1.8.25
  - RUBY VERSION: 1.9.3 (2012-11-10 patchlevel 327) [x86_64-darwin11.4.0]
  - INSTALLATION DIRECTORY: /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327
  - RUBY EXECUTABLE: /Users/emmanueleleyae2/.rvm/rubies/ruby-1.9.3-p327/bin/ruby
  - EXECUTABLE DIRECTORY: /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-darwin-11
  - GEM PATHS:
     - /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327
     - /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327@global
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://rubygems.org/

/Users/emmanueleleyae2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:247:in `to_specs': Please install the mysql adapter: `gem install activerecord-mysql-adapter` (Could not find mysql (~> 2.8.1) amongst [actionmailer-3.2.8, actionpack-3.2.8, activemodel-3.2.12, activemodel-3.2.8, activerecord-3.2.12, activerecord-3.2.8, activeresource-3.2.8, activesupport-3.2.12, activesupport-3.2.8, addressable-2.3.2, arel-3.0.2, blankslate-2.1.2.4, bluecloth-2.2.0, builder-3.0.4, bundler-1.2.1, capybara-1.1.2, cgi_multipart_eof_fix-2.5.0, childprocess-0.3.6, coffee-rails-3.2.2, coffee-script-2.2.0, coffee-script-source-1.4.0, daemons-1.1.9, daemons-1.0.10, diff-lcs-1.1.3, erubis-2.7.0, excon-0.16.10, execjs-1.4.0, fastthread-1.0.7, ffi-1.2.0, gem_plugin-0.2.3, gli-2.5.4, heroku-2.33.2, heroku-api-0.3.7, hike-1.2.1, i18n-0.6.1, journey-1.0.4, jquery-rails-2.1.4, jquery-rails-2.1.3, json-1.7.5, launchy-2.1.2, libwebsocket-0.1.7.1, mail-2.4.4, mime-types-1.19, mongrel-1.2.0.pre2, multi_json-1.4.0, multi_json-1.3.7, mysql2-0.3.11, netrc-0.7.7, nokogiri-1.5.5, parslet-1.5.0, pg-0.12.2, polyglot-0.3.3, rack-1.4.1, rack-cache-1.2, rack-protection-1.4.0, rack-ssl-1.3.2, rack-test-0.6.2, rails-3.2.8, railties-3.2.8, rake-10.0.2, rake-0.9.2.2, rdoc-3.12, rest-client-1.6.7, rspec-2.9.0, rspec-core-2.9.0, rspec-expectations-2.9.1, rspec-mocks-2.9.0, rspec-rails-2.9.0, rubygems-bundler-1.1.0, rubyzip-0.9.9, rvm-1.11.3.5, sass-3.2.3, sass-rails-3.2.5, selenium-webdriver-2.27.1, showoff-0.7.0, sinatra-1.3.5, sprockets-2.1.3, sqlite3-1.3.6, sqlite3-1.3.5, thor-0.16.0, tilt-1.3.3, treetop-1.4.12, tzinfo-0.3.35, uglifier-1.3.0, websocket-1.0.4, xpath-0.1.4]) (LoadError)
    from /Users/emmanueleleyae2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:256:in `to_spec'
    from /Users/emmanueleleyae2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems.rb:1231:in `gem'
    from /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.12/lib/active_record/connection_adapters/mysql_adapter.rb:5:in `<top (required)>'
    from /Users/emmanueleleyae2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
    from /Users/emmanueleleyae2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
    from /Users/emmanueleleyae2/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
    from /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `block in require'
    from /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in `load_dependency'
    from /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in `require'
    from /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/connection_specification.rb:50:in `resolve_hash_connection'
    from /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/connection_specification.rb:29:in `spec'
    from /Users/emmanueleleyae2/.rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/connection_specification.rb:130:in `establish_connection'
    from test.rb:4:in `<main>'

:adapter => 'mysql'

:adapter => 'mysql2'

change adapter mysql2

development:
  adapter: mysql2
  database: library_development
  username: root
  password: 
  host: localhost
test:
  adapter: mysql2
  database: library_test
  username: root
  password: 
  host: localhost
production:
  adapter: mysql2
  database: library_production
  username: root
  password: 
  host: localhost