Question

I have a quite complex helper method that is also needed to be in a model. I’ve done it with just including some helpers in my model, but the same approach is not working on Rails 3.0.7.

module ContentsHelper
  def content_teaser record
    # it uses image_tag, truncate, raw, and some others.
  end
end

class Content < ActiveRecord::Base
  include ActionView::Helpers::TagHelper
  include ActionView::Helpers::UrlHelper
  include ActionController::UrlFor
  include ActionView::Helpers::TextHelper
  include ActionView::Helpers::RawOutputHelper
  include ActionView::Helpers::AssetTagHelper
  include ContentsHelper
  include Rails.application.routes.url_helpers

  def teaser
    content_teaser self.body        
  end
end

and the error information I have

undefined local variable or method `config' for #<Content:0x10bac7248>
app/helpers/contents_helper.rb:8:in `content_teaser'
app/models/content.rb:70:in `teaser'

any suggestion/advice?

Answer 1

I also got hit with the error working with Rails 3.1 RC

NameError:
   undefined local variable or method `config'

Some Rails source tracing and I discovered the missing include ActionView::AssetPaths.

include ActionView::AssetPaths
include ActionView::Helpers::AssetTagHelper