Rails 3.0解析XML和插入数据库

我是Rails的新手，我正试图将我的应用程序连接到第三方API(它没有Rails的gem或插件)。

理想情况下，我希望能够做的是解析数据(我听说过关于Nokogiri的好东西，但不知道如何使用它来做我想做的事情。)，然后插入到数据库中。

有人能给我指路吗?欢呼。

更新:

Rake任务:

task :fetch_flyers => :environment do
require 'nokogiri'
require 'open-uri'
doc = Nokogiri::XML(open(url))
  events = doc.search('//event')
    events.each do |event|
      @data = Event.new(
        :name           => event.at('name').text,
        :date           => '2011-09-18',
        :time           => '17:00',
        :description    => event.at('long_description').text,
        :address        => event.at('street').text,
        :postcode       => event.at('postcode').text,   
        :price          => event.at('costs').text,
        :user_id        => 1,
        :genre_id       => 1,   
        :town_id        => 1)
    @data.save
    if @data.save
        puts "Success"
    else
        puts "This didn't save, F***"
    end
    end
end

我已经在我的代码中指定了URL，只是从这个代码粘贴中隐藏了它。这段代码不起作用。我怎么也弄不明白为什么。所有我得到的是终端输出说"这没有保存，F**这意味着由于某种原因事件没有被保存。有人能解释一下吗?

更新2:

我已经检查了URL是正确的，并检查了XML被正确解析使用:

# Printing Out the Variables to make sure they work.
    puts @name
    puts @date
    puts @time
    puts @desc
    puts @address
    puts @postcode
    puts @price
    puts @user
    puts @genre
    puts @town

. .它成功地打印出终端中的值。但是，它仍然不能插入到我的数据库中。

My Model如下:

belongs_to :user
    belongs_to :genre
    belongs_to :town
    has_attached_file :image, :styles => { :grid => '90x128#', :list => '140x200#', :full => '400x548'}
    validates_attachment_content_type :image, :content_type => ['image/jpeg', 'image/png']  
    before_post_process :normalise_file_name
  validates :name, :presence => true
  validates :date, :presence => true
  validates :time, :presence => true
  validates :description, :presence => true
  validates :address, :presence => true
  validates :town, :presence => true
  validates :postcode, :presence => true
  validates :price, :presence => true
  validates :user_id, :presence => true
  validates :viewcount, :presence => true

我的Development.log文件只显示了以下内容:

  [1m[35mTown Load (0.1ms)[0m  SELECT "towns".* FROM "towns" WHERE "towns"."id" = 1 LIMIT 1
      [1m[36mTown Load (0.1ms)[0m  [1mSELECT "towns".* FROM "towns" WHERE "towns"."id" = 1 LIMIT 1[0m
      [1m[35mTown Load (0.1ms)[0m  SELECT "towns".* FROM "towns" WHERE "towns"."id" = 1 LIMIT 1
      [1m[36mTown Load (0.1ms)[0m  [1mSELECT "towns".* FROM "towns" WHERE "towns"."id" = 1 LIMIT 1[0m
      [1m[35mTown Load (0.1ms)[0m  SELECT "towns".* FROM "towns" WHERE "towns"."id" = 1 LIMIT 1
      [1m[36mTown Load (0.1ms)[0m  [1mSELECT "towns".* FROM "towns" WHERE "towns"."id" = 1 LIMIT 1[0m
      [1m[35mTown Load (0.1ms)[0m  SELECT "towns".* FROM "towns" WHERE "towns"."id" = 1 LIMIT 1
    .......

每次我尝试运行rake任务。这有什么意义吗?

doc = Nokogiri::XML(xml_string)
events = doc.search('//event')
events.each do |event|
  puts event.at('short_description')
end