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