Sprockets Processor for paths fixing

application-8a31c931e49c2706ef714f7a5253788e.css

body{background-image:url("/assets/bg-ef8538157f3dc9558b9443c31ccd896c.jpg")}

application.css

body
{
  background-image: url('/assets/bg.png');
}

asset_path_processor.rb

class AssetPathProcessor < Sprockets::Processor
  def evaluate(context, locals)
    data.gsub(%r{["|']/assets/(.+)["|']}) do
      '"' + context.asset_path($1) + '"'
    end
  end
end

initializer.rb

require 'asset_path_processor'
 
Rails.application.assets.register_preprocessor('text/css', AssetPathProcessor)