Prawn: undefined method fetch for # [Model Object] <Bus#x89df798f>

Prawn.rb

## A message like this is a clear indication of the fact that super in your PDF rendering class needs you use brackets as follows:

class ListingPDF < Prawn::Document
  
  def initialize(bus, view)
    super # should be super()
    @listing = bus
    @view = view
  end
    
end

Glad it helped :) I might've been a little slow with the response