在rails中用<a href=“/phrase”>短语</a>替换{短语}

Question

我想使用rails ( <a href="/phrase">phrase</a>文件)搜索并用<a href="/phrase">phrase</a>替换{file}的任何出现。需要替换多个短语，而且这些短语是事先不知道的。

完整的例子：

Hi {guys}, I really like {ruby on rails}

需要成为

Hi <a href="/guys">guys</a>, <a href="/ruby on rails">ruby on rails</a>

这是针对用户生成的内容站点(格林尼治标准时间)的。

Answer 1

这是简单的regexp，只需使用

your_string.gsub(/{(.*?)}/, '<a href="\\1">\\1</a>')

示例：

"{aaa} is not {bbb} you know".gsub(/{(.*?)}/, '<a href="/\\1">\\1</a>')

将产生

<a href="/aaa">aaa</a> is not <a href="/bbb">bbb</a> you know

Answer 2

你可以用gsub做这件事。

irb(main):001:0> str = " I have written this phrase statement, I want to replace occurences of all phrase with other statement"
=> " I have written this phrase statement, I want to replace occurences of all phrase with other statement"
irb(main):002:0> str.gsub("phrase",'<a href="/phrase">phrase</a>')
=> " I have written this <a href=\"/phrase\">phrase</a> statement, I want to replace occurences of all <a href=\"/phrase\">phrase</a> with other statement"

Answer 3

一个更好的方法是使用标记输出引擎(红地毯是最健壮的)。

您必须创建一个自定义渲染器

#lib/custom_renderer.rb
class AutoLinks < Redcarpet::Render::HTML
  def auto_link(phrase) #-> will need to search through content. Can research further
    link_to phrase, "/#{phrase}"
  end
end

#controller
markdown = Redcarpet::Markdown.new(AutoLinks, auto_link: "ruby on rails")