如何使Ruby on Rails（Rails v4，Ruby v1.9.3）与MySQL一起使用

Casey 发表于 Dev

凯西

这是我已经尝试找到答案的地方：教程要点，stackoverflow，另一个堆栈溢出和官方指南。

我仍然不知道我在做什么错。正确配置database.yml后，我尝试创建项目，这是我得到的错误：

“请更新您的PATH以包括构建工具，或从' http://rubyinstaller.org/downloads '下载DevKit并按照' http://github.com/oneclick/rubyinstaller/wiki/Development-Kit '中的说明进行操作

安装mysql2（0.3.13）时发生错误，并且Bundler无法继续。gem install mysql2 -v '0.3.13'捆绑前确保成功。”

为什么找不到mysql2 v0.3.13？

操作系统：Windows 7 Rails：4.0.0 Ruby：1.9.3 DevKit

我遇到的错误 $ bundle exec rails s Could not locate Gemfile

$ bundle Bundler::GemfileNotFound

`$ gem install mysql2
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
        ERROR: Failed to build gem native extension.

        c:/Ruby193/bin/ruby.exe extconf.rb
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=c:/Ruby193/bin/ruby
        --with-mysql-dir
        --without-mysql-dir
        --with-mysql-include
        --without-mysql-include=${mysql-dir}/include
        --with-mysql-lib
        --without-mysql-lib=${mysql-dir}/lib
extconf.rb:37:in `<main>': undefined method `[]' for nil:NilClass (NoMethodError)


Gem files will remain installed in c:/Ruby193/lib/ruby/gems/1.9.1/gems/mysql2-0.3.13 for inspection.`

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