Rails未定义常量：ActiveRecord :: RecordNotFound

Question

I have the following code in my Application Controller:

class ApplicationController < ActionController::Base
  protect_from_forgery
  rescue_from ActiveRecord::RecordNotFound, :with => :record_not_found
  private
  def record_not_found
    render :text => "404 Not Found", :status => 404
  end
end

When I run it (actually I run rake db:migrate ) I get the error uninitialized constant ActiveRecord::RecordNotFound . This seems too simple -- HELP!

Answer 1

它需要require 'active_record/errors' ，我在require 'active_record/errors'搜索时发现的所有示例中都没有看到。