How to Fix Rails and MySQL Compatibility Issues on Snow Leopard?

Rails and MySQL on Snow Leopard: Getting It Right

After upgrading to Snow Leopard, it's not uncommon to encounter difficulties running Rails applications due to issues with the bundled MySQL.rb driver. To resolve this, follow these steps:

1. Install the MySQL gem:

   sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

2. Uninstall any existing MySQL gems from previous installations to avoid conflicts.

If you encounter issues with locating libmysqlclient.16.dylib during the MySQL gem installation, it's important to ensure that the correct path to mysql_config is specified. The following steps can help:

1. Download the appropriate MySQL version for Snow Leopard (5.1.37 64-bit) from mysql.com.
2. Ensure that mysql_config is available at /usr/local/mysql/bin/mysql_config.

3. Update the gem system:

   sudo gem update --system

4. Run the following command:

   sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

By following these steps, you can ensure that Rails and MySQL are properly configured on your Snow Leopard installation, allowing you to run your applications without errors.

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