Class Sequel::TimestampMigrator
In: lib/sequel/extensions/migration.rb
Parent: Migrator

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

DEFAULT_SCHEMA_COLUMN = :filename
DEFAULT_SCHEMA_TABLE = :schema_migrations
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

Set up all state for the migrator instance

[Source]

     # File lib/sequel/extensions/migration.rb, line 622
622:     def initialize(db, directory, opts={})
623:       super
624:       @target = opts[:target]
625:       @applied_migrations = get_applied_migrations
626:       @migration_tuples = get_migration_tuples
627:     end

Public Instance methods

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

[Source]

     # File lib/sequel/extensions/migration.rb, line 631
631:     def is_current?
632:       migration_tuples.empty?
633:     end

Apply all migration tuples on the database

[Source]

     # File lib/sequel/extensions/migration.rb, line 636
636:     def run
637:       migration_tuples.each do |m, f, direction|
638:         t = Time.now
639:         db.log_info("Begin applying migration #{f}, direction: #{direction}")
640:         checked_transaction(m) do
641:           m.apply(db, direction)
642:           fi = f.downcase
643:           direction == :up ? ds.insert(column=>fi) : ds.filter(column=>fi).delete
644:         end
645:         db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds")
646:       end
647:       nil
648:     end

[Validate]