How can I limit the amount of words displayed from a Ruby string?

Question

the Ruby code is below:

<%= product.advert_text -%>

What script can limit the amount of words?

Answer 1

Since you are working with Rails, you can use the truncate method.

So, something like:

<%= truncate(product.advert_text, :length => 20) -%>

The :length option sets the # of characters to truncate at & will add ellipses at the end (you can override the default ellipses with the :omission option - see the documentation on my link).

Answer 2

如果要限制为一定数量的单词，最简单的方法是分割空格，然后将所需数量的单词加回到字符串中。

<%=product.advert_text.split.slice(0, limit).join(" ") -%>