ruby-on-rails - Rails 不知道如何构建任务

Question

我正在尝试从网站上抓取数据。我正在从 index.html.erb 运行 rake

 <% Article.run_rake("fetch_games") %>

我在 .rb 文件中定义了它。这是文章.rb

require 'rake'
require 'rubygems'
#load './lib/tasks/article_task.rake'

class Article < ActiveRecord::Base

 def self.run_rake(fetch_games)
  Rails.root + "lib/tasks/article_task.rake"
  Rake::Task["fetch_games"].invoke
 end
end

这里是 rakefile 本身:article_task.rake

desc "Fetch Games"
task :fetch_games => :environment do 

 require 'nokogiri'
 require 'open-uri'

 url = "http://espn.go.com/nba/schedule"
 data = Nokogiri::HTML(open(url))
 games = data.css('.responsive-table-wrap')

 games.each do |game|

 #check for a listing
 if !game.at_css("caption").nil?
    #Date
    puts game.at_css("caption").text
 else
    puts "No Listing"   
 end

 #check for the team name
 if !game.at_css(".team-name").nil?
    #Team name
    puts game.at_css(".team-name").text
 else
    puts "No Games Scheduled"
 end
    #empty
    puts ""
 end
end

当我从终端运行它时，它会提取我需要的东西。但是当我尝试通过 rails server 运行它时，它给了我这个错误:

我做错了什么？顺便说一句，ruby/rails 的新手

Answer 1

我们需要在你运行它之前加载任务。你注释掉那一行 -

 load './lib/tasks/article_task.rake'

这样做-

  require 'rake'
  require 'rubygems'
  load './lib/tasks/article_task.rake'

  class Article < ActiveRecord::Base

    def self.run_rake(fetch_games)
      Rake::Task["fetch_games"].invoke
    end
  end