Question

在我的mac上通过终端升级了几个宝石后，我创建了一个由mysql数据库备份的新rails项目。启动应用程序后，将显示常规欢迎页面。

问题出在这里 - 我尝试点击标题为“关于你的应用程序的环境”的链接，我在浏览器中收到以下输出：

MissingSourceFile in Rails/infoController#properties
no such file to load -- mysql

我也在终端

中收到此输出

The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.
Processing Rails::InfoController#properties (for 127.0.0.1 at 2008-12-09 20:41:41) [GET]
Processing Rails::InfoController#properties (for 127.0.0.1 at 2008-12-09 20:41:41) [GET]
MissingSourceFile (no such file to load -- mysql):
...

正如它所说的那样，我在停止申请后试图发出“gem install mysql”，只是受到了我无法理解的这一块行话的欢迎：

WARNING:  Installing to ~/.gem since /Library/Ruby/Gems/1.8 and
      /usr/bin aren't both writable.
WARNING:  You don't have /Users/mymac/.gem/ruby/1.8/bin in your PATH,
      gem executables will not run.
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb install mysql
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lm... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lz... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lsocket... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lnsl... no
checking for mysql_query() in -lmysqlclient... 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 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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
    --with-mysql-config
    --without-mysql-config
    --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-mysqlclientlib
    --without-mysqlclientlib
    --with-mlib
    --without-mlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-zlib
    --without-zlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-socketlib
    --without-socketlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-nsllib
    --without-nsllib
    --with-mysqlclientlib
    --without-mysqlclientlib


Gem files will remain installed in /Users/mymac/.gem/ruby/1.8/gems/mysql-2.7 for inspection.
Results logged to /Users/mymac/.gem/ruby/1.8/gems/mysql-2.7/gem_make.out

显然我的mysql安装有问题，因为我还尝试运行rake命令来创建数据库，这提示我以下内容。

!!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.
rake aborted!
no such file to load -- mysql

(See full trace by running task with --trace)

但是，当我在命令行运行“mysql --version”时，安装了mysql！

mysql  Ver 14.12 Distrib 5.0.67, for apple-darwin9.4.0 (i686) using readline 5.1

我也试过发布“sudo gem install mysql”，但这也无济于事：

sudo gem install mysql
Password:
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb install mysql
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lm... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lz... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lsocket... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lnsl... no
checking for mysql_query() in -lmysqlclient... no


Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/mysql-2.7 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/mysql-2.7/gem_make.out

我也尝试按照bradheintz的指示发出“sudo gem install mysql - --with-mysql-config = / usr / local / mysql / bin / mysql_config”，这似乎安装好了，但在尝试查看之后再次应用程序环境，没有发生ajaxy下拉，rails应用程序完全停止！在应用程序决定死在我之前打印以下输出大声笑。

dyld: lazy symbol binding failed: Symbol not found: _mysql_init
  Referenced from: /Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle
  Expected in: dynamic lookup

dyld: Symbol not found: _mysql_init
  Referenced from: /Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle
  Expected in: dynamic lookup

Trace/BPT trap

如果有人能够理解这里发生了什么，以及如何解决这个问题，我将非常感激：）

Answer 1

问题是MySQL gem构建本机扩展并需要有关在何处查找某些库的系统特定信息。您必须在命令行上提供此功能。

查看this page - 重要的一点（无论如何，对我有用）是：

sudo gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

当然，请务必使用正确的路径替换您自己的系统。

另外，坚持通过gem install运行sudo命令。

更大的问题是，宝石软件没有提供任何关于你不能像对待其他宝石一样gem install mysql的事实的反馈（实际上，曾经可以用于MySQL宝石））。

Answer 2

尝试仅强制构建32位版本（假设您使用的是Intel Mac，带有gem的-V应该会为您提供更详细的输出）

sudo env ARCHFLAGS="-arch i386" gem install -V mysql -- --with-mysql-config=/usr/local/sql32/bin/mysql_config

此博客文章中的更多信息：http://blog.pastie.org/2008/10/mysql-64-bit-ruby-32-bit-friends-again.html

Answer 3

上次我看到这个错误的时候是我尝试安装mysql / ruby适配器的时候。我在Mac上升级rails到rails 1.2.2后遇到同样的错误，因为默认情况下1.2.2删除了mysql gem。

我上次发现的原因是缺少mysql客户端或库。以Redhat为例，您可以转到此链接，并安装mysql客户端和库。 http://dev.mysql.com/downloads/mysql/5.0.html#linux-rhel5-x86-32bit-rpms

让我知道结果。

乔

MYSQL安装问题

3 个答案: