Support Matrix

flex_columns is tested against:

• Ruby (MRI) 1.8.7, 1.9.3, 2.0.0, and JRuby 1.7.6.
• ActiveRecord 3.0.20, 3.1.12, 3.2.16, and 4.0.2.
• MySQL 5.x, PostgreSQL 8.x and 9.x, and SQLite 3.

It is not especially sensitive to any of these components, and so should work fine with future versions; it uses a very small, standard subset of the ActiveRecord API, no database-specific code, and straightforward Ruby code. It also should work fine with any and all databases — these are just the ones that are actively tested.