Erubis block helper throwing error with concat

Question

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

I have run into a similar problem using Formtastic and Erubis on both Rails 2.3.4 and 2.3.5. — Toby Hede, Dec 21 '09 at 09:33

score 2 · Answer 1 · answered Dec 05 '09 at 12:56

2

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! )

answered Dec 05 '09 at 12:56

DEfusion

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score 2 · Answer 2 · answered Jun 16 '11 at 16:49

2

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

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

answered Jun 16 '11 at 16:49

pic

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This fixed a problem I was seeing under rails 2.3.14 where I saw the error `undefined method `safe_concat' for nil:NilClass` when calling form_for – robd Jul 07 '12 at 23:04

score 1 · Answer 3 · answered Mar 27 '10 at 19:16

1

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.

answered Mar 27 '10 at 19:16

Mike Dotterer

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score 0 · Answer 4 · answered Jun 22 '11 at 14:26

0

Adding

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

to config/initializers/erubis.rb fixed it for me

answered Jun 22 '11 at 14:26

Dandan

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Erubis block helper throwing error with concat

4 Answers4

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