Erubis 块助手通过 concat 抛出错误
我有几个块助手，这是我正在做的一个简单示例：
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：
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 的调用会删除错误，但是最终我的包装器没有被渲染
使用：
- Rails 2.3.5
- Erubis 2.6.5
- 并尝试这个 gem 帮助 Erubis（尽管是 2.6.4）和 Rails 2.3 更好地协同工作
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
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.<<
Removing the call to concat removes the error but ends up with my wrapper not being rendered
Using:
- 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
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实际上使用 rails_xss 插件，这是我的最终目标，包含修复为了这。
我只需更改我的助手即可执行此操作
concat( content.html_safe! )Actually using the rails_xss plugin, which was my ultimate goal contains a fix for this.
I just had to change my helper to do this
concat( content.html_safe! )从 Erubis 2.7.0 开始，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 和 Rails 2.3 不能很好地协同工作。查看这篇文章：http： //daveelkins.com/2009/06/18/making-erubis-264-and-rails-23-work-together/ 他在 github 上创建了一个 gem，可以让它们一起工作。
Erubis and Rails 2.3 don't work together well. Check out this post: http://daveelkins.com/2009/06/18/making-erubis-264-and-rails-23-work-together/ He has created a gem on github that gets them to work together.
添加
Erubis::Helpers::RailsHelper.init_properties = {:bufvar => '@output_buffer'}
到 config/initializers/erubis.rb 为我修复了它
Adding
Erubis::Helpers::RailsHelper.init_properties = {:bufvar => '@output_buffer'}
to config/initializers/erubis.rb fixed it for me