我正在将我的数据库从 sqlite 更新到 mySQL（@ mu 太短了......我知道。我知道。我应该在一开始就这样做）并遇到问题。
到目前为止的过程如下：
步骤1：
更新 database.yml 并按此运行 rake db:schema:load
rake aborted!
Please install the mysql adapter: `gem install activerecord-mysql-adapter` (mysql is not part of the bundle. Add it to Gemfile.)
第2步：
跑rvm @global do gem install mysql
Fetching: mysql-2.9.1.gem (100%)
Building native extensions. This could take a while...
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.
/Users/charliekim/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb
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
checking for main() in -lmygcc... 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
--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=/Users/charliekim/.rvm/rubies/ruby-2.0.0-p247/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}/
--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
--with-mygcclib
--without-mygcclib
--with-mysqlclientlib
--without-mysqlclientlib
Gem files will remain installed in /Users/charliekim/.rvm/gems/ruby-2.0.0-p247@global/gems/mysql-2.9.1 for inspection.
Results logged to /Users/charliekim/.rvm/gems/ruby-2.0.0-p247@global/gems/mysql-2.9.1/ext/mysql_api/gem_make.out
第 3 步：
搜索 SO =>无法在 Mac OS X 上安装 mysql gem
这个答案中的解决方案不起作用，因为没有mySQL目录，/usr/local所以我无法在那里编辑代码。
第4步：
mkmf.log=> http://pastebin.com/7qSdv73R
的输出= gcc -v>
Using built-in specs.
Target: i686-apple-darwin10
Configured with: /var/tmp/gcc/gcc-5666.3~6/src/configure --disable-checking --enable-werror --prefix=/usr --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin10 --program-prefix=i686-apple-darwin10- --host=x86_64-apple-darwin10 --target=i686-apple-darwin10 --with-gxx-include-dir=/include/c++/4.2.1
Thread model: posix
gcc version 4.2.1 (Apple Inc. build 5666) (dot 3)
编辑1：
我也跑了： gem install activerecord-mysql-adapter
返回：
Fetching: mysql-2.9.1.gem (100%)
Building native extensions. This could take a while...
Successfully installed mysql-2.9.1
Fetching: i18n-0.6.5.gem (100%)
Successfully installed i18n-0.6.5
Fetching: atomic-1.1.13.gem (100%)
Building native extensions. This could take a while...
Successfully installed atomic-1.1.13
Fetching: thread_safe-0.1.2.gem (100%)
Successfully installed thread_safe-0.1.2
Fetching: activesupport-4.0.0.gem (100%)
Successfully installed activesupport-4.0.0
Fetching: activerecord-mysql-adapter-0.0.1.gem (100%)
Successfully installed activerecord-mysql-adapter-0.0.1
Fetching: builder-3.1.4.gem (100%)
Successfully installed builder-3.1.4
Fetching: activemodel-4.0.0.gem (100%)
Successfully installed activemodel-4.0.0
Fetching: arel-4.0.0.gem (100%)
Successfully installed arel-4.0.0
Fetching: activerecord-deprecated_finders-1.0.3.gem (100%)
Successfully installed activerecord-deprecated_finders-1.0.3
Parsing documentation for mysql-2.9.1
unable to convert "\xCF" from ASCII-8BIT to UTF-8 for lib/mysql/mysql_api.bundle, skipping
Installing ri documentation for mysql-2.9.1
Parsing documentation for i18n-0.6.5
Installing ri documentation for i18n-0.6.5
Parsing documentation for atomic-1.1.13
unable to convert "\xCF" from ASCII-8BIT to UTF-8 for lib/atomic_reference.bundle, skipping
Installing ri documentation for atomic-1.1.13
Parsing documentation for thread_safe-0.1.2
Installing ri documentation for thread_safe-0.1.2
Parsing documentation for activesupport-4.0.0
unable to convert "\x80" from ASCII-8BIT to UTF-8 for lib/active_support/values/unicode_tables.dat, skipping
Installing ri documentation for activesupport-4.0.0
Parsing documentation for activerecord-mysql-adapter-0.0.1
Installing ri documentation for activerecord-mysql-adapter-0.0.1
Parsing documentation for builder-3.1.4
/Users/charliekim/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/rdoc/parser.rb:87: warning: Unsupported encoding : ignored
/Users/charliekim/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/rdoc/parser.rb:87: warning: Unsupported encoding ignored
Installing ri documentation for builder-3.1.4
Parsing documentation for activemodel-4.0.0
Installing ri documentation for activemodel-4.0.0
Parsing documentation for arel-4.0.0
Installing ri documentation for arel-4.0.0
Parsing documentation for activerecord-deprecated_finders-1.0.3
Installing ri documentation for activerecord-deprecated_finders-1.0.3
10 gems installed
但我在运行时仍然遇到同样的错误rake db:schema:load：
Rake aborted!
Please install the mysql adapter: `gem install activerecord-mysql-adapter` (mysql is not part of the bundle. Add it to Gemfile.)
...
编辑2：
这里是database.yml：
development:
adapter: mysql
encoding: utf8
reconnect: false
database: db/development
pool: 5
username: [name]
password: [password]
socket: /tmp/mysql.sock
test:
adapter: mysql
encoding: utf8
reconnect: false
database: db/test
pool: 5
username: [name]
password: [password]
socket: /tmp/mysql.sock
production:
adapter: mysql
encoding: utf8
reconnect: false
database: db/production
pool: 5
username: [name]
password: [password]
socket: /tmp/mysql.sock
我添加gem "mysql"了gemfile，现在出现错误
rake aborted!
Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
我不知道这些套接字应该是什么，我根据 SO 帖子填写了它们，所以这可能是问题的一部分。