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 42 42: def self.apply(db, direction) 43: raise(ArgumentError, "Invalid migration direction specified (#{direction.inspect})") unless [:up, :down].include?(direction) 44: new(db).public_send(direction) 45: end
Returns the list of Migration descendants.
# File lib/sequel/extensions/migration.rb, line 48 48: def self.descendants 49: @descendants ||= [] 50: end
Adds the new migration class to the list of Migration descendants.
# File lib/sequel/extensions/migration.rb, line 53 53: def self.inherited(base) 54: descendants << base 55: end
Set the database associated with this migration.
# File lib/sequel/extensions/migration.rb, line 36 36: def initialize(db) 37: @db = db 38: end
Don‘t allow transaction overriding in old migrations.
# File lib/sequel/extensions/migration.rb, line 58 58: def self.use_transactions 59: nil 60: end
Intercepts method calls intended for the database and sends them along.
# File lib/sequel/extensions/migration.rb, line 67 67: def method_missing(method_sym, *args, &block) 68: # Allow calling private methods for backwards compatibility 69: @db.send(method_sym, *args, &block) 70: end