问题
Trying to get a Rails app running on Snow Leopard.
- Downloaded mysql-5.5.8-osx10.6-x86_64.dmg and ran installer
- Ruby 1.8.7 (Default OS X version)
- Rails 2.3.5
When I attempt to run "rake db:migrate" I get
- rake aborted!
- uninitialized constant MysqlCompat::MysqlRes
Yes I know this has been asked before. I have already reviewed the following links and followed the steps included in them and the result is the same each time.
- Rails, MySQL and Snow Leopard
- http://techliberty.blogspot.com/2009/12/dealing-with-rake-aborted-uninitialized.html
- http://www.schmidp.com/2009/06/14/rubyrails-and-mysql-on-snow-leopard-10a380/
Prior to the following commands I run "sudo gem uninstall mysql" followed by "sudo gem clean mysql" based on the above links:
- sudo gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
- sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
It is still failing. I am just flumoxed and would greatly appreciate any help.
Many thanks!
回答1:
Not had the experience myself and I'm using Snow Leopard, RVM and rails 2.3.5 to 3.0.3, but found another view which deals with the uninstall and reinstall via :
export ARCHFLAGS="-arch i386 -arch x86_64" ;sudo gem install --no-rdoc --no-ri -v=2.7 mysql -- --with-mysql-dir=/usr/local/mysql --with-mysql-config=/usr/local/mysql/bin/mysql_config
For more details see the posting at: http://accidentaltechnologist.com/apple/fixing-uninitialized-constant-mysqlcompatmysqlres-error-on-snow-leopard/
回答2:
For El Capitan you don't need to uninstall / install.
Just found your libmysqlclient.18.dylib file. Location will depent on how you installed mysql
locate libmysqlclient.18.dylib
Once you have the path create a symb link as:
ln -s /usr/local/mysql-5.5.20-osx10.6-x86_64/lib/libmysqlclient.18.dylib /usr/local/lib/libmysqlclient.18.dylib
You have two change first param according to your dynamic library location (use the first command).
On El Capitan the link should be to /usr/local/lib. On previous versions link was to /usr/lib/
来源：https://stackoverflow.com/questions/4915461/rails-mysql-error-uninitialized-constant-mysqlcompatmysqlres