删除非法字符的助手？

发布于 2024-09-14 21:29:22 字数 367 浏览 8 评论 0原文

我正在使用用户输入字符串来创建 url，并且我只希望 url 包含小写字母和连字符

例如 example.com/this-is-a-url

在我的模型中，到目前为止我已添加：

  def to_param
      name.downcase.gsub(" ", "-")
  end

这使其小写并连字符。如何删除所有非法字符，例如 '/"$£%& 等？正则表达式可能是答案，但是 Rails 中是否已经内置了用于此目的的内容？

也许我不执行上述操作，而是这样做应该创建一个验证来确保“名称”只是空格和字母？是否有为此目的内置的东西？

原文

I am using a user input string to create a url and I only want the url to contain lowercase letters and hyphens

e.g. example.com/this-is-a-url

In my model, I have added so far:

  def to_param
      name.downcase.gsub(" ", "-")
  end

This makes it lowercase and hyphenated. How can I remove all illegal characters, such as '/"$£%& and so on? A regular expression might be the answer but is there something built in for this purpose already in Rails?

Perhaps instead of doing the above, I should create a validation that makes sure that 'name' is only spaces and letters? Is there something built in for this purpose?

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