Ruby on Rails/Built-In Rails Tools/Convenient Rake tasks

You can find out what tasks are currently available to Rake with the rake -T command. The tasks below are common and used on regular basis.

Database Tasks

 * rake db:migrate [VERSION=x]: Execute the migrations to the specified version. If the version is omitted then it will migrate to the highest version possible.
 * rake db:sessions:clear: Clear all of the sessions in the database.

Test Tasks

 * rake test:units: Execute unit tests

Cache Tasks

 * rake tmp:cache:clear: Clear out the page/fragment cache.