自从过去6个月以来，我一直使用Rubymine 3.1.1和rails 3.0.6。 我刚开始使用rails“3.1.0.rc5”和RubyMine 3.2.3以及mysql。
为了亲身体验新版本的rails，我尝试使用单一脚手架创建一个示例应用程序（用户名：字符串密码：字符串），但它在db上提供以下错误：migrate： -
== CreateUsers: migrating ====================================================
-- create_table(:users)
rake aborted!
An error has occurred, all later migrations canceled:
undefined method `rows' for nil:NilClass
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
-> 0.1100s
== CreateUsers: migrated (0.1100s) ===========================================
Process finished with exit code 1
有什么建议吗？
提前致谢！
==== List of gems ( Gemfile.lock ) ====
GEM
remote: http://rubygems.org/
specs:
actionmailer (3.1.0.rc5)
actionpack (= 3.1.0.rc5)
mail (~> 2.3.0)
actionpack (3.1.0.rc5)
activemodel (= 3.1.0.rc5)
activesupport (= 3.1.0.rc5)
builder (~> 3.0.0)
erubis (~> 2.7.0)
i18n (~> 0.6)
rack (~> 1.3.1)
rack-cache (~> 1.0.2)
rack-mount (~> 0.8.1)
rack-test (~> 0.6.0)
sprockets (~> 2.0.0.beta.12)
activemodel (3.1.0.rc5)
activesupport (= 3.1.0.rc5)
bcrypt-ruby (~> 2.1.4)
builder (~> 3.0.0)
i18n (~> 0.6)
activerecord (3.1.0.rc5)
activemodel (= 3.1.0.rc5)
activesupport (= 3.1.0.rc5)
arel (~> 2.1.4)
tzinfo (~> 0.3.29)
activeresource (3.1.0.rc5)
activemodel (= 3.1.0.rc5)
activesupport (= 3.1.0.rc5)
activesupport (3.1.0.rc5)
multi_json (~> 1.0)
ansi (1.3.0)
arel (2.1.4)
bcrypt-ruby (2.1.4-x86-mingw32)
builder (3.0.0)
coffee-rails (3.1.0.rc.5)
actionpack (~> 3.1.0.rc1)
coffee-script (>= 2.2.0)
railties (~> 3.1.0.rc1)
sprockets (>= 2.0.0.beta.9)
coffee-script (2.2.0)
coffee-script-source
execjs
coffee-script-source (1.1.2)
erubis (2.7.0)
execjs (1.2.4)
multi_json (~> 1.0)
hike (1.2.0)
i18n (0.6.0)
jquery-rails (1.0.12)
railties (~> 3.0)
thor (~> 0.14)
mail (2.3.0)
i18n (>= 0.4.0)
mime-types (~> 1.16)
treetop (~> 1.4.8)
mime-types (1.16)
multi_json (1.0.3)
mysql2 (0.2.6-x86-mingw32)
polyglot (0.3.2)
rack (1.3.2)
rack-cache (1.0.2)
rack (>= 0.4)
rack-mount (0.8.1)
rack (>= 1.0.0)
rack-ssl (1.3.2)
rack
rack-test (0.6.1)
rack (>= 1.0)
rails (3.1.0.rc5)
actionmailer (= 3.1.0.rc5)
actionpack (= 3.1.0.rc5)
activerecord (= 3.1.0.rc5)
activeresource (= 3.1.0.rc5)
activesupport (= 3.1.0.rc5)
bundler (~> 1.0)
railties (= 3.1.0.rc5)
railties (3.1.0.rc5)
actionpack (= 3.1.0.rc5)
activesupport (= 3.1.0.rc5)
rack-ssl (~> 1.3.2)
rake (>= 0.8.7)
rdoc (~> 3.4)
thor (~> 0.14.6)
rake (0.9.2)
rdoc (3.9.1)
sass (3.1.7)
sass-rails (3.1.0.rc.5)
actionpack (~> 3.1.0.rc1)
railties (~> 3.1.0.rc1)
sass (>= 3.1.4)
sprockets (>= 2.0.0.beta.9)
sprockets (2.0.0.beta.13)
hike (~> 1.2)
rack (~> 1.0)
tilt (~> 1.1, != 1.3.0)
thor (0.14.6)
tilt (1.3.2)
treetop (1.4.10)
polyglot
polyglot (>= 0.3.1)
turn (0.8.2)
ansi (>= 1.2.2)
tzinfo (0.3.29)
uglifier (1.0.0)
execjs (>= 0.3.0)
multi_json (>= 1.0.2)
PLATFORMS
x86-mingw32
DEPENDENCIES
coffee-rails (~> 3.1.0.rc)
jquery-rails
mysql2
rails (= 3.1.0.rc5)
sass-rails (~> 3.1.0.rc)
turn
uglifier
=== gem environment ===
RubyGems Environment:
- RUBYGEMS VERSION: 1.3.7
- RUBY VERSION: 1.9.2 (2010-08-18 patchlevel 0) [i386-mingw32]
- INSTALLATION DIRECTORY: C:/Ruby192/lib/ruby/gems/1.9.1
- RUBY EXECUTABLE: C:/Ruby192/bin/ruby.exe
- EXECUTABLE DIRECTORY: C:/Ruby192/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86-mingw32
- GEM PATHS:
- C:/Ruby192/lib/ruby/gems/1.9.1
- C:/Users/rashmi/.gem/ruby/1.9.1
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- http://rubygems.org/
答案 0 :(得分：1)
我正在使用mac OS X Lion，解决方案是：
On Gemfile:
Just replace the old version of mysql for this one:
gem 'mysql2', '0.3.7'