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.
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
[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
is_current?()
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
run()
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 = Time.now 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', Time.now - t)} seconds") 700 end 701 nil 702 end