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 631 631: def initialize(db, directory, opts=OPTS) 632: super 633: @target = opts[:target] 634: @applied_migrations = get_applied_migrations 635: @migration_tuples = get_migration_tuples 636: end
The timestamp migrator is current if there are no migrations to apply in either direction.
# File lib/sequel/extensions/migration.rb, line 640 640: def is_current? 641: migration_tuples.empty? 642: end
Apply all migration tuples on the database
# File lib/sequel/extensions/migration.rb, line 645 645: def run 646: migration_tuples.each do |m, f, direction| 647: t = Time.now 648: db.log_info("Begin applying migration #{f}, direction: #{direction}") 649: checked_transaction(m) do 650: m.apply(db, direction) 651: fi = f.downcase 652: direction == :up ? ds.insert(column=>fi) : ds.filter(column=>fi).delete 653: end 654: db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds") 655: end 656: nil 657: end