Class: Sequel::TimestampMigrator
- Defined in:
- lib/sequel/extensions/migration.rb
Overview
The migrator used if any migration file version is greater than 20000101. 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.
Constant Summary collapse
Constants inherited from Migrator
Migrator::MIGRATION_FILE_PATTERN, Migrator::MUTEX
Instance Attribute Summary collapse
-
#applied_migrations ⇒ Object
readonly
Array of strings of applied migration filenames.
-
#migration_tuples ⇒ Object
readonly
Get tuples of migrations, filenames, and actions for each migration.
Attributes inherited from Migrator
#column, #db, #directory, #ds, #files, #table, #target
Instance Method Summary collapse
-
#initialize(db, directory, opts = OPTS) ⇒ TimestampMigrator
constructor
Set up all state for the migrator instance.
-
#is_current? ⇒ Boolean
The timestamp migrator is current if there are no migrations to apply in either direction.
-
#run ⇒ Object
Apply all migration tuples on the database.
Methods inherited from Migrator
apply, check_current, is_current?, migrator_class, run
Constructor Details
#initialize(db, directory, opts = OPTS) ⇒ TimestampMigrator
Set up all state for the migrator instance
676 677 678 679 680 681 |
# File 'lib/sequel/extensions/migration.rb', line 676 def initialize(db, directory, opts=OPTS) super @target = opts[:target] @applied_migrations = get_applied_migrations @migration_tuples = get_migration_tuples end |
Instance Attribute Details
#applied_migrations ⇒ Object (readonly)
Array of strings of applied migration filenames
670 671 672 |
# File 'lib/sequel/extensions/migration.rb', line 670 def applied_migrations @applied_migrations end |
#migration_tuples ⇒ Object (readonly)
Get tuples of migrations, filenames, and actions for each migration
673 674 675 |
# File 'lib/sequel/extensions/migration.rb', line 673 def migration_tuples @migration_tuples end |
Instance Method Details
#is_current? ⇒ Boolean
The timestamp migrator is current if there are no migrations to apply in either direction.
685 686 687 |
# File 'lib/sequel/extensions/migration.rb', line 685 def is_current? migration_tuples.empty? end |
#run ⇒ Object
Apply all migration tuples on the database
690 691 692 693 694 695 696 697 698 699 700 701 702 |
# File 'lib/sequel/extensions/migration.rb', line 690 def run migration_tuples.each do |m, f, direction| t = Time.now db.log_info("Begin applying migration #{f}, direction: #{direction}") checked_transaction(m) do m.apply(db, direction) fi = f.downcase direction == :up ? ds.insert(column=>fi) : ds.where(column=>fi).delete end db.log_info("Finished applying migration #{f}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds") end nil end |