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 619 619: def initialize(db, directory, opts={}) 620: super 621: @target = opts[:target] 622: @applied_migrations = get_applied_migrations 623: @migration_tuples = get_migration_tuples 624: end
The timestamp migrator is current if there are no migrations to apply in either direction.
# File lib/sequel/extensions/migration.rb, line 628 628: def is_current? 629: migration_tuples.empty? 630: end
Apply all migration tuples on the database
# File lib/sequel/extensions/migration.rb, line 633 633: def run 634: migration_tuples.each do |m, f, direction| 635: t = Time.now 636: db.log_info("Begin applying migration #{f}, direction: #{direction}") 637: checked_transaction(m) do 638: m.apply(db, direction) 639: fi = f.downcase 640: direction == :up ? ds.insert(column=>fi) : ds.filter(column=>fi).delete 641: end 642: db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds") 643: end 644: nil 645: end