Ruby on rails 如何更新属性

我对更新属性有问题。我尝试通过cron进行更新

调度程序.rb

every 3.minutes do
  runner "update_from_feed_continuously(feed_url)"
end

feed_entry.rb

class FeedEntry < ActiveRecord::Base
  attr_accessible :guid, :name, :url, :feed_url
  after_create { |feed| FeedEntry.update_from_feed(feed.feed_url) }
  def self.update_from_feed(feed_url)
    feed = Feedzirra::Feed.fetch_and_parse(feed_url)
    add_entries(feed.entries)
  end

  def self.update_from_feed_continuously(feed_url)
    feed = Feedzirra::Feed.update(feed)
    add_entries(feed.new_entries) if feed.updated?
  end

  private
  def self.add_entries(entries)
    entries.each do |entry|
      unless exists? :guid => entry.id
        create!(
          :name => entry.title, 
          :url => entry.url, 
          :guid => entry.id
        )
      end
    end
  end
end

class FeedEntryentry.id
创造！(
：name=>entry.title，
：url=>entry.url，
：guid=>entry.id
)
结束
结束
结束
结束

我在任何时候都使用gem feedzirra和gem

Loading development environment (Rails 3.2.13)
1.9.3p392 :001 > FeedEntry.update_from_feed_continuously(feed_url)
NameError: undefined local variable or method `feed_url' for main:Object
from (irb):1
from /Users/ipatov/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/console.rb:47:in `start'
from /Users/ipatov/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/console.rb:8:in `start'
from /Users/ipatov/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

加载开发环境（Rails 3.2.13）
1.9.3p392:001>FeedEntry。不断从feed更新（feed url）
NameError:未定义的局部变量或main:对象的“feed_url”方法
来自（irb）：1
from/Users/ipatov/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/console.rb:47:in'start'
from/Users/ipatov/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/console.rb:8:in'start'
from/Users/ipatov/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:41:in`'
来自脚本/rails:6:in'require'
来自脚本/rails:6:in`'

1.9.3p392:002>

---

我正在努力实施铁路运输计划。最初，我试图通过控制台加载提要url，然后通过cron更新，您有什么问题？显示为scheduler.rb定义的错误消息where is

feed\u url

？这应该是从路由派生出来的吗？您不需要实际传入一个提要URL吗？这也意味着您的方法是错误的，因为您传入了一个提要url，但尝试在没有查找通过FeedEntry设置的提要url的情况下对提要进行操作（通过url？）。从提要更新（“U”）@Anton:我的意思是在scheduler.rb中，您连续调用

从提要更新（提要url）

，但尚未定义

提要\u url

。您要传递的url是什么？