用concat的Erubis阻止助手抛出错误

问题描述

我有几个帮助块的人，这是我正在做的一个简单示例:

I have a couple of block helpers, here's a simple example of what I'm doing:

def wrap_foo foo, &block
    data = capture(&block)

    content = "
      <div class=\"foo\" id=\"#{foo}\">
        #{data}
      </div>"
    concat( content )
end

我只是尝试erubis，它给了我以下错误:

I'm just trying out erubis and it's giving me the following error:

You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.<<

删除对concat的调用会删除该错误，但最终导致未渲染我的包装器

Removing the call to concat removes the error but ends up with my wrapper not being rendered

使用:

• Rails 2.3.5
• Erubis 2.6.5
• 并尝试了 this gem 帮助Erubis(虽然是2.6.4)和Rails 2.3一起玩起来更好

• Rails 2.3.5
• Erubis 2.6.5
• And tried this gem that helps Erubis (though 2.6.4) and Rails 2.3 play better together

推荐答案

自Erubis 2.7.0起，您可以通过以下方式利用:bufvar选项:

since Erubis 2.7.0 you can exploit the :bufvar option in this way:

Erubis::Helpers::RailsHelper.init_properties = {:bufvar => '@output_buffer'}

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