解析文本区域中的换行符而不允许所有 html 标签
我有一个文本区域字段，用户可以在其中输入内容。当在页面上显示条目时，rails 会为每个换行符返回 \n ，这对于页面上的 html 来说根本就没有换行符。
据我所知，解决此问题的标准方法是使用 .gsub 命令，将 \n 替换为 .html_safe 以确保
问题是，我不想 html_safe 内容 - html 仍应被替换，但
建议表示赞赏。
I have a textarea field where users can enter content. When it comes to displaying their entry on a page, rails returns \n for each line break, which appears as no break at all for html on the page.
From what I gather, the standard way of getting around this is a .gsub command, replacing \n with <br />, and then a .html_safe on the end to ensure the <br /> renders.
The problem is, I don't want to html_safe the content - html should still be replaced, but <br /> tags should be injected into the (non-escaped) content.
Suggestions appreciated.
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simple_format方法非常适合格式化换行符。它将文本块包装在标记中，并将换行符转换为换行符 (
然而，它不会转义其他 html 字符，而只是允许它们。对于您想要的内容，结合
simple_format和 sanitize< /a> 应该做得很好。尝试使用这个：<%=raw sanitize(simple_format(@article.body), :tags => %w(br p) ) %>The
simple_formatmethod is good for formatting line breaks. It wraps text blocks in<p>tags, and converts newline characters into line breaks (<br>) (double newlines breaks the following text into a second paragraph).It doesn't however escape other html characters, and instead just allows them. For what you're after a combination of
simple_formatalong with sanitize should do nicely. Try using this:<%=raw sanitize(simple_format(@article.body), :tags => %w(br p) ) %>如果您希望在文本区域中输入的 HTML 标记可见，但仍希望显示换行符，请尝试以下操作：
“h”引用所有 HTML 特殊字符和“simple_format”，然后将换行符转换为
。
If you want HTML tags entered in the text area visible, but still want line breaks to show, try this:
The "h" quotes all the HTML special chars and "simple_format" then converts the line breaks to <br>.
根据您想要执行的操作，您可以按原样存储
\n，然后在屏幕上显示内容时，使用(h @comment.content).gsub(" \n", '，即先转义所有HTML标签，然后将')
\n替换为
Depending on what you want to do, you can store the
\nas it is, and then, when displaying the content on screen, use(h @comment.content).gsub("\n", '<br>'), which is to first escape all HTML tags, and then replace the\nwith the<br>所有这些都可以通过使用
<pre>标签来避免。这也具有保留制表符的优点。例如All this can be avoided by using
<pre>tags. This has the advantage of preserving tabbing as well. eg