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
706 def initialize(db, directory, opts=OPTS)
707   @allow_migration_number = opts[:allow_migration_number]
708   super
709   @target = opts[:target]
710   @applied_migrations = get_applied_migrations
711   @migration_tuples = get_migration_tuples
712 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
717 def self.run_single(db, path, opts=OPTS)
718   new(db, File.dirname(path), opts).run_single(path, opts[:direction] || :up)
719 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
723 def is_current?
724   migration_tuples.empty?
725 end
run()

Apply all migration tuples on the database

[show source] 
    # File lib/sequel/extensions/migration.rb
728 def run
729   migration_tuples.each do |m, f, direction|
730     apply_migration(m, f, direction)
731   end
732   nil
733 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
737 def run_single(path, direction)
738   migration = load_migration_file(path)
739   file_name = File.basename(path)
740   already_applied = applied_migrations.include?(file_name.downcase)
741 
742   return if direction == :up ? already_applied : !already_applied
743 
744   apply_migration(migration, file_name, direction)
745   nil
746 end