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.
DEFAULT_SCHEMA_COLUMN | = | :filename |
DEFAULT_SCHEMA_TABLE | = | :schema_migrations |
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 |
Set up all state for the migrator instance
# File lib/sequel/extensions/migration.rb, line 669 669: def initialize(db, directory, opts=OPTS) 670: super 671: @target = opts[:target] 672: @applied_migrations = get_applied_migrations 673: @migration_tuples = get_migration_tuples 674: end
The timestamp migrator is current if there are no migrations to apply in either direction.
# File lib/sequel/extensions/migration.rb, line 678 678: def is_current? 679: migration_tuples.empty? 680: end
Apply all migration tuples on the database
# File lib/sequel/extensions/migration.rb, line 683 683: def run 684: migration_tuples.each do |m, f, direction| 685: t = Time.now 686: db.log_info("Begin applying migration #{f}, direction: #{direction}") 687: checked_transaction(m) do 688: m.apply(db, direction) 689: fi = f.downcase 690: direction == :up ? ds.insert(column=>fi) : ds.filter(column=>fi).delete 691: end 692: db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds") 693: end 694: nil 695: end