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

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

new(db, directory, opts={})

Set up all state for the migrator instance

[Source]

     # File lib/sequel/extensions/migration.rb, line 422
422:     def initialize(db, directory, opts={})
423:       super
424:       @target = opts[:target] || latest_migration_version
425:       @current = opts[:current] || current_migration_version
426: 
427:       raise(Error, "No current version available") unless current
428:       raise(Error, "No target version available, probably because no migration files found or filenames don't follow the migration filename convention") unless target
429: 
430:       @direction = current < target ? :up : :down
431:       @migrations = get_migrations
432:     end

Public Instance methods

run()

Apply all migrations on the database

[Source]

     # File lib/sequel/extensions/migration.rb, line 435
435:     def run
436:       migrations.zip(version_numbers).each do |m, v|
437:         t = Time.now
438:         lv = up? ? v : v + 1
439:         db.log_info("Begin applying migration version #{lv}, direction: #{direction}")
440:         db.transaction do
441:           m.apply(db, direction)
442:           set_migration_version(v)
443:         end
444:         db.log_info("Finished applying migration version #{lv}, direction: #{direction}, took #{sprintf('%0.6f', Time.now - t)} seconds")
445:       end
446:       
447:       target
448:     end

[Validate]