Question

我有一个循环，输出我从网站抓取的一些信息。为了使信息以可读的方式显示，我在字符串中添加了<br>。但是当它运行时，它显示<br>，转义html。我使用过html_safe和raw但是都没有用。代码有什么问题？代码在视图主页中调用（不用担心，一旦代码工作，我将移动它。）

<%= 

 require 'rubygems'
 require 'nokogiri'
 require 'open-uri'


time = Time.new
month = I18n.t("date.abbr_month_names")[time.month]
day = time.day
"#{month} #{day}"

#United States
cities = [
   "sfbay", "losangeles", "athensga", "phoenix", "santabarbara", "denver",
   "panamacity", "miami", "austin", "bakersfield", "keys", "newyork"
]

cities.map do |city|

#Search Terms
search_terms = ["mechanic", "car", "tech"]

search_terms.map do |term|

  escaped_term = CGI.escape(term)

  url = "http://#{city}.craigslist.org/search/jjj?query=#{escaped_term}&catAbb=jjj&
  srchType=A"

  doc = Nokogiri::HTML(open(url))

  doc.css(".row").map do |row|

      date = row.css(".itemdate").text

      a_tag = row.css("a")[0]

      text = a_tag.text

      link = a_tag[:href]

      if date = "#{month} #{day}"
        @strings << "#{date} #{text} #{link}"
      end

  end

 end

end

%>

Answer 1

doc.css(".row").map do |row|
  date = row.css(".itemdate").text
  a_tag = row.css("a")[0]
  text = a_tag.text
  link = a_tag[:href]
  if date = "#{month} #{day}"
    "<br/>".html_safe + "#{date} #{text} #{link}"
  end
end

Answer 2

嗯根本不确定但是尝试以下方法：

doc.css(".row").map do |row|

  date = row.css(".itemdate").text
  a_tag = row.css("a")[0]
  text = a_tag.text
  link = a_tag[:href]

  if date = "#{month} #{day}"
    @string = "#{date} #{text} #{link}<br />"
  end

end.html_safe

另一种方式，不解决你的问题，而是在每一行显示br：

# in controller or whatever
@strings = []
if date = "#{month} #{day}"
  @strings << "#{date} #{text} #{link}"
end

# in the view:
<%= raw(@strings.join('<br />')) %>

在Ruby中输出HTML不使用html_safe

2 个答案: