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.
DEFAULT_SCHEMA_COLUMN | = | :version |
DEFAULT_SCHEMA_TABLE | = | :schema_info |
Error | = | Migrator::Error |
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 |
Set up all state for the migrator instance
# 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
The integer migrator is current if the current version is the same as the target version.
# 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
# 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