MigrationProxy is used to defer loading of the actual migration classes until they are needed
# File lib/active_record/migration.rb, line 519 def initialize(name, version, filename, scope) super @migration = nil end
# File lib/active_record/migration.rb, line 524 def basename File.basename(filename) end
# File lib/active_record/migration.rb, line 536 def load_migration require(File.expand_path(filename)) name.constantize.new end
# File lib/active_record/migration.rb, line 532 def migration @migration ||= load_migration end