class Sequel::TimestampMigrator

  1. lib/sequel/extensions/migration.rb
Superclass: Migrator

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.

Constants

Error = Migrator::Error  

Attributes

applied_migrations [R]

Array of strings of applied migration filenames
migration_tuples [R]

Get tuples of migrations, filenames, and actions for each migration

Public Class methods

new(db, directory, opts=OPTS)

Set up all state for the migrator instance

[show source] 
    # File lib/sequel/extensions/migration.rb
701 def initialize(db, directory, opts=OPTS)
702   super
703   @target = opts[:target]
704   @applied_migrations = get_applied_migrations
705   @migration_tuples = get_migration_tuples
706 end
run_single(db, path, opts=OPTS)

Apply the migration in the given file path. See Migrator.run for the available options. Additionally, this method supports the :direction option for whether to run the migration up (default) or down.

[show source] 
    # File lib/sequel/extensions/migration.rb
711 def self.run_single(db, path, opts=OPTS)
712   new(db, File.dirname(path), opts).run_single(path, opts[:direction] || :up)
713 end

Public Instance methods

is_current?()

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

[show source] 
    # File lib/sequel/extensions/migration.rb
717 def is_current?
718   migration_tuples.empty?
719 end
run()

Apply all migration tuples on the database

[show source] 
    # File lib/sequel/extensions/migration.rb
722 def run
723   migration_tuples.each do |m, f, direction|
724     apply_migration(m, f, direction)
725   end
726   nil
727 end
run_single(path, direction)

Apply single migration tuple at the given path with the given direction on the database.

[show source] 
    # File lib/sequel/extensions/migration.rb
731 def run_single(path, direction)
732   migration = load_migration_file(path)
733   file_name = File.basename(path)
734   already_applied = applied_migrations.include?(file_name.downcase)
735 
736   return if direction == :up ? already_applied : !already_applied
737 
738   apply_migration(migration, file_name, direction)
739   nil
740 end