class Wizard class Step attr_reader :id, :updater attr_accessor :index, :fields, :next, :previous, :banner, :disabled, :description_vars def initialize(id) @id = id @fields = [] end def add_field(attrs) field = Field.new(attrs) field.step = self @fields << field field end def has_fields? @fields.present? end def on_update(&block) @updater = block end end end