mysql - Windows 是否支持 Datamapper 的 dm_mysql_adapter gem？

Question

我想更多地使用 Ruby，目前似乎已经掌握了 sinatra，但现在还想从关系数据库中提取数据。我倾向于将 Mysql 用于测试应用程序并尝试安装 gem，但是当它尝试编译它所依赖的 native do_mysql gem 时，我总是遇到异常。

我确实安装了 native 扩展，它们在 JSON gem 上运行良好，我记得前一段时间在某处读到说 do_mysql 当前不支持 Windows，所以我想知道是否仍然如此。

在 Windows 7 上使用 ruby​​ 1.9.2(通过 ruby​​ 安装程序 + native 扩展安装)

以下是异常(exception)情况，以防有帮助:

C:\dump\ruby\DataMapperTest\gems>gem install dm-mysql-adapter-1.2.0.gem
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing dm-mysql-adapter-1.2.0.gem:
        ERROR: Failed to build gem native extension.

        C:/Tools/Ruby192/bin/ruby.exe extconf.rb
checking for my_global.h... no
checking for mysql.h... no
checking for main() in -llibmysql... no
checking for mysql_query() in mysql.h... no
checking for mysql_ssl_set() in mysql.h... no
checking for localtime_r()... no
checking for gmtime_r()... no
checking for mysql.h... no
checking for MYSQL_TYPE_STRING in mysql.h... no
checking for MYSQL_TYPE_BIT in mysql.h... no
checking for MYSQL_TYPE_NEWDECIMAL in mysql.h... no
checking for mysql_query() in mysql.h... no
checking for mysql_ssl_set() in mysql.h... no
checking for mysql_sqlstate() in mysql.h... no
checking for mysql_get_ssl_cipher() in mysql.h... no
checking for mysql_set_character_set() in mysql.h... no
checking for mysql_get_server_version() in mysql.h... no
checking for MYSQL_FIELD.charsetnr in mysql.h... no
creating Makefile

make
C:/Tools/Ruby192/bin/ruby -e "puts 'EXPORTS', 'Init_do_mysql'"  > do_mysql-i386-
mingw32.def
gcc -I. -IC:/Tools/Ruby192/include/ruby-1.9.1/i386-mingw32 -I/C/Tools/Ruby192/in
clude/ruby-1.9.1/ruby/backward -I/C/Tools/Ruby192/include/ruby-1.9.1 -I.   -O3 -
g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings
 -Wno-missing-field-initializers -Wno-long-long -Wall   -o do_common.o -c do_com
mon.c
gcc -I. -IC:/Tools/Ruby192/include/ruby-1.9.1/i386-mingw32 -I/C/Tools/Ruby192/in
clude/ruby-1.9.1/ruby/backward -I/C/Tools/Ruby192/include/ruby-1.9.1 -I.   -O3 -
g -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings
 -Wno-missing-field-initializers -Wno-long-long -Wall   -o do_mysql.o -c do_mysq
l.c
do_mysql.c:5:19: fatal error: mysql.h: No such file or directory
compilation terminated.
make: *** [do_mysql.o] Error 1


Gem files will remain installed in C:/Tools/Ruby192/lib/ruby/gems/1.9.1/gems/do_
mysql-0.10.7 for inspection.
Results logged to C:/Tools/Ruby192/lib/ruby/gems/1.9.1/gems/do_mysql-0.10.7/ext/
do_mysql/gem_make.out

C:\dump\ruby\DataMapperTest\gems>

Mysql 5.5社区版已安装配置，Mysql已经添加到系统PATH中。

Answer 1

DataMapper 和 DataObjects(连接到数据库的较低层)可以在 Windows 上工作。

但是，似乎 do_mysql 0.10.7 缺少用于 x86-mingw32 平台的预编译二进制文件:

http://rubygems.org/gems/do_mysql/versions

您可以使用 MySQL Connector/C 接口(interface)自行编译 do_mysql，它与您计算机中安装的 MySQL 版本无关。

请查看这篇提供安装说明的博文:

http://blog.mmediasys.com/2011/07/07/installing-mysql-on-windows-7-x64-and-using-ruby-with-it/

说明适用于 mysql gem，但将其更改为 do_mysql 应该可以工作(除了特定于 MySQL 的示例代码。

希望对您有所帮助。