如何将 Ruby on rails 与 MySQL 连接起来

Question

我最近安装了 Ruby on rails 和 MySQL。 版本是 ruby​​ 2.1.7 和 MySQL Workbench 6.3 CE。 我输入了gem install mysql2 -v=0.2.6，这发生了；

Fetching: mysql2-0.2.6.gem <100%>
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
       Error: Failed to build gem native extensions.

    C:/Ruby21/bin/ruby.exe extconf.rb
checking for rb_thread_blocking_region()... yes
checkimg for main() in -llibmysql... no
*** 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 option:
    --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=.
    --curdit
    --ruby=C:Ruby21/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
    --with-libmysqllib
    --without-libmysqllib

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby21/lib/ruby/gems/2.1.0/gems/mysql2-0.2
.6 for inspection.
Results logged to C:/Ruby21/lib/ruby/gems/2.1.0/extensions/x86-mingw32/2.1.0/mys
ql2-0.2.6/gem_make.out

谁能帮我把 Ruby on rails 和 MySQL 连接起来？

Answer 1

来自https://github.com/brianmario/mysql2：

Linux 和其他 Unix

您可能需要安装 libmysqlclient-dev 或 mysql-devel 等软件包；请参阅您的发行版的包指南以找到特定的包。我们看到的最常见问题是拥有库文件 libmysqlclient.so 但缺少头文件 mysql.h 的用户——仔细检查您是否安装了 -dev 包。

正确的解决方案取决于您的操作系统。由于 mysql2 代码部分是用 C 编写的，因此您需要在系统上安装一些库文件来安装它。