class Sequel::TimestampMigrator

  1. lib/sequel/extensions/migration.rb
Superclass: Migrator

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.


Public Class

  1. new

Public Instance

  1. applied_migrations
  2. is_current?
  3. migration_tuples
  4. run


Error = Migrator::Error  


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

[show source]
    # File lib/sequel/extensions/migration.rb
676 def initialize(db, directory, opts=OPTS)
677   super
678   @target = opts[:target]
679   @applied_migrations = get_applied_migrations
680   @migration_tuples = get_migration_tuples
681 end

Public Instance methods


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

[show source]
    # File lib/sequel/extensions/migration.rb
685 def is_current?
686   migration_tuples.empty?
687 end

Apply all migration tuples on the database

[show source]
    # File lib/sequel/extensions/migration.rb
690 def run
691   migration_tuples.each do |m, f, direction|
692     t =
693     db.log_info("Begin applying migration #{f}, direction: #{direction}")
694     checked_transaction(m) do
695       m.apply(db, direction)
696       fi = f.downcase
697       direction == :up ? ds.insert(column=>fi) : ds.where(column=>fi).delete
698     end
699     db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', - t)} seconds")
700   end
701   nil
702 end