reversible() Instance Public methods Used to specify an operation that can be run in one direction or another. Call the methods up and down of the yielded object to run a block only in one given direction. The whole block will be called in the right order within the migration. In the following example, the looping on users will always be done when the three columns 'first_name', 'last_name' and 'full_name' exist, even when migrating down: class SplitNameMigration < ActiveRecord:

puts(text="") Instance Public methods

proper_table_name(name, options = {}) Instance Public methods Finds the correct table name given an Active Record object. Uses the Active Record object's own table_name, or pre/suffix from the options passed in.

next_migration_number(number) Instance Public methods Determines the version number of the next migration.

migrate(direction) Instance Public methods Execute this migration in the named direction

method_missing(method, *arguments, &block) Instance Public methods

exec_migration(conn, direction) Instance Public methods

down() Instance Public methods

copy(destination, sources, options = {}) Instance Public methods

connection() Instance Public methods