Class | Sequel::Migration |
In: |
lib/sequel/extensions/migration.rb
|
Parent: | Object |
Sequel‘s older migration class, available for backward compatibility. Uses subclasses with up and down instance methods for each migration:
Class.new(Sequel::Migration) do def up create_table(:artists) do primary_key :id String :name end end def down drop_table(:artists) end end
Part of the migration extension.
Applies the migration to the supplied database in the specified direction.
# File lib/sequel/extensions/migration.rb, line 35 35: def self.apply(db, direction) 36: raise(ArgumentError, "Invalid migration direction specified (#{direction.inspect})") unless [:up, :down].include?(direction) 37: new(db).send(direction) 38: end
Returns the list of Migration descendants.
# File lib/sequel/extensions/migration.rb, line 41 41: def self.descendants 42: @descendants ||= [] 43: end
Adds the new migration class to the list of Migration descendants.
# File lib/sequel/extensions/migration.rb, line 46 46: def self.inherited(base) 47: descendants << base 48: end
Set the database associated with this migration.
# File lib/sequel/extensions/migration.rb, line 29 29: def initialize(db) 30: @db = db 31: end
Don‘t allow transaction overriding in old migrations.
# File lib/sequel/extensions/migration.rb, line 51 51: def self.use_transactions 52: nil 53: end