dynamic_matchers。rb:55:在‘method_missing’:undefined method‘migration_error=’for ActiveRecord::Base:Class (NoMethodError)

I'm on Windows. Ruby v.1.9.3p392 / Rails v. 3.2.13 - This is the demo_app project from the 2nd chapter of Michael Hart's Ruby on Rails Tutorial.I'm on Windows. Ruby v.1.9.3p392 / Rails v. 3.2