WickedPdf stoped working on my local system-Collection of common programming errors

I’m getting this error while generating pdf using wkhtmltopdf

undefined method `pdf_from_string' for #

my wicked_pdf.rb

WickedPdf.config = {

:wkhtmltopdf => '/usr/local/bin/wkhtmltopdf',
:layout => "pdf.html",
:margin => {    :top=> 40,
                :bottom => 20,
                :left=> 30,
                :right => 30},
:header => {:html => { :template=> 'layouts/pdf_header.html'}},
:footer => {:html => { :template=> 'layouts/pdf_footer.html'}}
# :exe_path => '/usr/bin/wkhtmltopdf'}

on command line

wkhtmltopdf google.com google.pdf 

is working fine.

Can anyone please suggest what should I do to solve this error?

  1. “pdf_from_string” means, that it makes pdf from STRING. So to make this method work it should recieve string.

      -  it is an object. 
    

    It should look like this:

    pdf_from_string("
    some html code

    ")

Originally posted 2013-11-27 05:07:39.