动态创建从ActiveRecordinheritance的类?
我希望能够动态创建类,用于从我的Rails应用程序之外编写,inheritance自ActiveRecord。
我坚持这样的事情:
require 'active_record' def create_arec(table_name) Class.new ActiveRecord::Base do self.table_name = table_name yield end end Band = create_arec 'bands' do scope :only_rock, -> {where genre: 'rock'} end rock_bands = Band.only_rock #undefined method `only_rock'
我如何使它工作,或者有人能告诉我更好的方法吗?
搞定了:
def create_arec(table_name, &block) klass = Class.new(ActiveRecord::Base){self.table_name = table_name} klass.class_eval &block klass end
谢谢@phoet