uninitialized constant MysqlCompat::MysqlRes (using mms2r gem)

Question

moved a rails app of mine onto a new server and had to install a few gem dependencies. However, after installing the mysql gem I get the error, uninitialized constant Mysql

Answer 1

I tried everything else here, but still got the problem. Downgrading from MySQL 5.5 to 5.1 fixed it for me. (Mac OS X 10.6.5)