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 495
495:     def initialize(db, directory, opts={})
496:       super
497:       @target = opts[:target] || latest_migration_version
498:       @current = opts[:current] || current_migration_version
499: 
500:       raise(Error, "No current version available") unless current
501:       raise(Error, "No target version available, probably because no migration files found or filenames don't follow the migration filename convention") unless target
502: 
503:       @direction = current < target ? :up : :down
504:       @migrations = get_migrations
505:     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 508
508:     def is_current?
509:       current_migration_version == target
510:     end

Apply all migrations on the database

[Source]

     # File lib/sequel/extensions/migration.rb, line 513
513:     def run
514:       migrations.zip(version_numbers).each do |m, v|
515:         t = Time.now
516:         lv = up? ? v : v + 1
517:         db.log_info("Begin applying migration version #{lv}, direction: #{direction}")
518:         checked_transaction(m) do
519:           m.apply(db, direction)
520:           set_migration_version(v)
521:         end
522:         db.log_info("Finished applying migration version #{lv}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds")
523:       end
524:       
525:       target
526:     end

[Validate]