Class: Sequel::TimestampMigrator

The migrator used if any migration file version is greater than 20000101. 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.

Methods

is_current? new run

Constants

Error = Migrator::Error

Attributes

applied_migrations	[R]	Array of strings of applied migration filenames
migration_tuples	[R]	Get tuples of migrations, filenames, and actions for each migration

Public Class methods

new(db, directory, opts=OPTS)

Set up all state for the migrator instance

[Source]

     # File lib/sequel/extensions/migration.rb, line 664
664:     def initialize(db, directory, opts=OPTS)
665:       super
666:       @target = opts[:target]
667:       @applied_migrations = get_applied_migrations
668:       @migration_tuples = get_migration_tuples
669:     end

Public Instance methods

is_current?()

The timestamp migrator is current if there are no migrations to apply in either direction.

[Source]

     # File lib/sequel/extensions/migration.rb, line 673
673:     def is_current?
674:       migration_tuples.empty?
675:     end

run()

Apply all migration tuples on the database

[Source]

     # File lib/sequel/extensions/migration.rb, line 678
678:     def run
679:       migration_tuples.each do |m, f, direction|
680:         t = Time.now
681:         db.log_info("Begin applying migration #{f}, direction: #{direction}")
682:         checked_transaction(m) do
683:           m.apply(db, direction)
684:           fi = f.downcase
685:           direction == :up ? ds.insert(column=>fi) : ds.where(column=>fi).delete
686:         end
687:         db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds")
688:       end
689:       nil
690:     end