Rails:模型中未定义的方法“截断" [英] Rails: Undefined method `truncate' in model

问题描述

我的模型中有以下方法可以裁剪记录的描述，但由于未知原因，截断方法不起作用:

I have the following method in my model which crops the record's description, but for an unknown reason the truncate method does not work:

def cropped_description
  nb_words_max = 500
  if description.length > nb_words_max
    truncate(description, :length => nb_words_max, :separator => ' ') + " ..."
  else
    description
  end
end

有人看到我做错了吗?谢谢.

Anyone sees what I'm doing wrong? Thanks.

推荐答案

你用错了，你应该在 String 上调用这个方法.查看 truncate 的签名.

You're using it wrong, you should be calling this method on a String. See truncate's signature.

使用:

if description.length > nb_words_max
  description.truncate(nb_words_max, :separator => ' ') + " ..."
else
  ...

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