The migrator used if any migration file version appears to be a timestamp.
Stores filenames of migration files, and can figure out which migrations
have not been applied and apply them, even if earlier migrations are added
after later migrations. If you plan to do that, the responsibility is on
you to make sure the migrations don’t conflict. Part of the
migration
extension.
Array of strings of applied migration filenames
Get tuples of migrations, filenames, and actions for each migration
Set up all state for the migrator instance
# File lib/sequel/extensions/migration.rb, line 683 def initialize(db, directory, opts=OPTS) super @target = opts[:target] @applied_migrations = get_applied_migrations @migration_tuples = get_migration_tuples end
The timestamp migrator is current if there are no migrations to apply in either direction.
# File lib/sequel/extensions/migration.rb, line 692 def is_current? migration_tuples.empty? end
Apply all migration tuples on the database
# File lib/sequel/extensions/migration.rb, line 697 def run migration_tuples.each do |m, f, direction| t = Time.now db.log_info("Begin applying migration #{f}, direction: #{direction}") checked_transaction(m) do m.apply(db, direction) fi = f.downcase direction == :up ? ds.insert(column=>fi) : ds.where(column=>fi).delete end db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds") end nil end