scss.erb ruby code not executing

问题

I am trying to load a background image which is stored on Rackspace's CloudFiles in my Stylesheet file. I used Fog & CarrierWave to upload the image file and to call the file. I keep on getting this error:

Invalid CSS after "...und-image: url(": expected ")", was "<%= design.main..."

preview.css.scss.erb:

html{
     background-image: url(<%= design.main_image_url.to_s %>);
}

---

Update: I rephrase my question and I got an answer from here

What I should have ask was "How to pass an instance variable to assets?" - Which you can can't

回答1:

Put the url in quotes.

url('<%= design.main_image_url.to_s %>');

来源：https://stackoverflow.com/questions/8745129/scss-erb-ruby-code-not-executing