Class: Sequel::TimestampMigrator

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.

Methods

is_current? new run

Constants

 :filename
 :schema_migrations
 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={})

Set up all state for the migrator instance

[Source]

     # File lib/sequel/extensions/migration.rb, line 631
631:     def initialize(db, directory, opts={})
632:       super
633:       @target = opts[:target]
634:       @applied_migrations = get_applied_migrations
635:       @migration_tuples = get_migration_tuples
636:     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 640
640:     def is_current?
641:       migration_tuples.empty?
642:     end

run()

Apply all migration tuples on the database

[Source]

     # File lib/sequel/extensions/migration.rb, line 645
645:     def run
646:       migration_tuples.each do |m, f, direction|
647:         t = Time.now
648:         db.log_info("Begin applying migration #{f}, direction: #{direction}")
649:         checked_transaction(m) do
650:           m.apply(db, direction)
651:           fi = f.downcase
652:           direction == :up ? ds.insert(column=>fi) : ds.filter(column=>fi).delete
653:         end
654:         db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds")
655:       end
656:       nil
657:     end