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 635 635: def initialize(db, directory, opts=OPTS) 636: super 637: @target = opts[:target] 638: @applied_migrations = get_applied_migrations 639: @migration_tuples = get_migration_tuples 640: end
The timestamp migrator is current if there are no migrations to apply in either direction.
# File lib/sequel/extensions/migration.rb, line 644 644: def is_current? 645: migration_tuples.empty? 646: end
Apply all migration tuples on the database
# File lib/sequel/extensions/migration.rb, line 649 649: def run 650: migration_tuples.each do |m, f, direction| 651: t = Time.now 652: db.log_info("Begin applying migration #{f}, direction: #{direction}") 653: checked_transaction(m) do 654: m.apply(db, direction) 655: fi = f.downcase 656: direction == :up ? ds.insert(column=>fi) : ds.filter(column=>fi).delete 657: end 658: db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds") 659: end 660: nil 661: end