Class Sequel::IntegerMigrator
In: lib/sequel/extensions/migration.rb
Parent: Migrator

The default migrator, recommended in most cases. Uses a simple incrementing version number starting with 1, where missing or duplicate migration file versions are not allowed. Part of the migration extension.

Methods

is_current?   new   run  

Constants

DEFAULT_SCHEMA_COLUMN = :version
DEFAULT_SCHEMA_TABLE = :schema_info
Error = Migrator::Error

Attributes

current  [R]  The current version for this migrator
direction  [R]  The direction of the migrator, either :up or :down
migrations  [R]  The migrations used by this migrator

Public Class methods

Set up all state for the migrator instance

[Source]

     # File lib/sequel/extensions/migration.rb, line 492
492:     def initialize(db, directory, opts={})
493:       super
494:       @target = opts[:target] || latest_migration_version
495:       @current = opts[:current] || current_migration_version
496: 
497:       raise(Error, "No current version available") unless current
498:       raise(Error, "No target version available, probably because no migration files found or filenames don't follow the migration filename convention") unless target
499: 
500:       @direction = current < target ? :up : :down
501:       @migrations = get_migrations
502:     end

Public Instance methods

The integer migrator is current if the current version is the same as the target version.

[Source]

     # File lib/sequel/extensions/migration.rb, line 505
505:     def is_current?
506:       current_migration_version == target
507:     end

Apply all migrations on the database

[Source]

     # File lib/sequel/extensions/migration.rb, line 510
510:     def run
511:       migrations.zip(version_numbers).each do |m, v|
512:         t = Time.now
513:         lv = up? ? v : v + 1
514:         db.log_info("Begin applying migration version #{lv}, direction: #{direction}")
515:         checked_transaction(m) do
516:           m.apply(db, direction)
517:           set_migration_version(v)
518:         end
519:         db.log_info("Finished applying migration version #{lv}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds")
520:       end
521:       
522:       target
523:     end

[Validate]