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
704 def initialize(db, directory, opts=OPTS)
705   super
706   @target = opts[:target]
707   @applied_migrations = get_applied_migrations
708   @migration_tuples = get_migration_tuples
709 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
714 def self.run_single(db, path, opts=OPTS)
715   new(db, File.dirname(path), opts).run_single(path, opts[:direction] || :up)
716 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
720 def is_current?
721   migration_tuples.empty?
722 end
run()

Apply all migration tuples on the database

[show source] 
    # File lib/sequel/extensions/migration.rb
725 def run
726   migration_tuples.each do |m, f, direction|
727     apply_migration(m, f, direction)
728   end
729   nil
730 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
734 def run_single(path, direction)
735   migration = load_migration_file(path)
736   file_name = File.basename(path)
737   already_applied = applied_migrations.include?(file_name.downcase)
738 
739   return if direction == :up ? already_applied : !already_applied
740 
741   apply_migration(migration, file_name, direction)
742   nil
743 end