Rails rake任务仅在生产中失败：“ NoMethodError：为URI：Module调用的私有方法'open'”

Question

我正在编写一个rake任务，该任务正在从其他网页获取信息。为此，我使用open-uri和nokogiri。我已经在开发中进行了测试，并且可以完成工作，但是随后我将其部署到生产服务器中并失败。

这是代码：

require 'open-uri'
require 'nokogiri'

desc 'recover eventos llerena'
task recover_eventos_llerena: :environment  do

  enlaces = []

  # Getting index and all links
  url = open(URI.parse("https://llerena.org/eventos/lista"))
  page = Nokogiri::HTML(url)

  page.css("a.fusion-read-more").each do |line|
    enlaces.push(line.attr('href'))
  end

  enlaces = enlaces.uniq

  #Inspecting everyone of them
  enlaces.each do |link|
    url = open(URI.parse(link))
    page = Nokogiri::HTML(url)

    title = page.css("h1").text
    if Evento.find_by_titulo(title) == nil

      description = page.css(".tribe-events-single-event-description.tribe-events-content.entry-content.description p").text
      date = page.css(".tribe-events-abbr").attr('title')
      image = page.css(".size-full").attr('src')

      Evento.create!(
        titulo: title,
        remote_imgevento_url: image,
        info: description,
        fecha: Date.parse(date)
      )

    end
  end

end

检查cron_error_log时得到：

rake aborted!
NoMethodError: private method `open' called for URI:Module
/home/deploy/guialocal/releases/20200204193434/lib/tasks/example.rake:23:in `block in <top (required)>'
/home/deploy/guialocal/shared/bundle/ruby/2.4.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/cli/exec.rb:74:in `load'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/cli/exec.rb:74:in `kernel_load'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/cli/exec.rb:28:in `run'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/cli.rb:463:in `exec'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/vendor/thor/lib/thor.rb:387:in `dispatch'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/cli.rb:27:in `dispatch'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/vendor/thor/lib/thor/base.rb:466:in `start'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/cli.rb:18:in `start'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/exe/bundle:30:in `block in <top (required)>'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/lib/bundler/friendly_errors.rb:124:in `with_friendly_errors'
/home/deploy/.rvm/gems/ruby-2.4.4/gems/bundler-2.0.1/exe/bundle:22:in `<top (required)>'
/home/deploy/.rvm/gems/ruby-2.4.4/bin/bundle:23:in `load'
/home/deploy/.rvm/gems/ruby-2.4.4/bin/bundle:23:in `<main>'
Tasks: TOP => recover_eventos_llerena
(See full trace by running task with --trace)

最后，我尝试在生产环境中运行控制台：

2.4.0 :001 > Rake::Task['recover_eventos_llerena'].execute
NameError: uninitialized constant Rake::Task
    from (irb):1

在Rails 2.7.0中，有一个警告，表示将来会弃用，我也更改了提议的新方法（无结果）：

url = URI.open("https://llerena.org/eventos/lista")

为什么会这样？

Answer 1

[不是在轨道上，而是类似的问题：我在运行ruby 2.7.0的计算机上编写并运行了一个脚本，当尝试在使用ruby 2.3.0的计算机上运行相同的脚本时，我遇到了与您相同的错误。

[检查文件open-uri.rb（在我的情况下为/usr/lib/ruby/2.7.0/之后，我发现较旧的ruby版本的文件在URI模块中没有公共方法。

相反，您需要使用Kernel＃Open。因此您的脚本将变为：

url = open("https://llerena.org/eventos/lista")